diff --git a/admin/admin_client.py b/admin/admin_client.py
index e0c29fb7f..59e0893a1 100644
--- a/admin/admin_client.py
+++ b/admin/admin_client.py
@@ -429,6 +429,13 @@ class AdminCLI:
         username_tree: Tree = command['username']
         username: str = username_tree.children[0].strip("'\"")
         print(f"Drop user: {username}")
+        url = f'http://{self.host}:{self.port}/api/v1/admin/users/{username}'
+        response = requests.delete(url, auth=HTTPBasicAuth(self.admin_account, self.admin_password))
+        res_json = response.json()
+        if response.status_code == 200:
+            print(res_json["message"])
+        else:
+            print(f"Fail to drop user, code: {res_json['code']}, message: {res_json['message']}")
 
     def _handle_alter_user(self, command):
         username_tree: Tree = command['username']
@@ -531,6 +538,7 @@ Commands:
   DROP USER <user>
   CREATE USER <user> <password>
   ALTER USER PASSWORD <user> <new_password>
+  ALTER USER ACTIVE <user> <on/off>
   LIST DATASETS OF <user>
   LIST AGENTS OF <user>
 
diff --git a/admin/routes.py b/admin/routes.py
index e93d830ef..8cd9633b1 100644
--- a/admin/routes.py
+++ b/admin/routes.py
@@ -57,8 +57,11 @@ def create_user():
 @login_verify
 def delete_user(username):
     try:
-        UserMgr.delete_user(username)
-        return success_response(None, "User and all data deleted successfully")
+        res = UserMgr.delete_user(username)
+        if res["success"]:
+            return success_response(None, res["message"])
+        else:
+            return error_response(res["message"])
 
     except AdminException as e:
         return error_response(e.message, e.code)
diff --git a/admin/services.py b/admin/services.py
index 708d24fbc..c5db5d90a 100644
--- a/admin/services.py
+++ b/admin/services.py
@@ -2,7 +2,7 @@ import re
 from werkzeug.security import check_password_hash
 from api.db import ActiveEnum
 from api.db.services import UserService
-from api.db.joint_services.user_account_service import create_new_user
+from api.db.joint_services.user_account_service import create_new_user, delete_user_data
 from api.db.services.canvas_service import UserCanvasService
 from api.db.services.user_service import TenantService
 from api.db.services.knowledgebase_service import KnowledgebaseService
@@ -61,7 +61,13 @@ class UserMgr:
     @staticmethod
     def delete_user(username):
         # use email to delete
-        raise AdminException("delete_user: not implemented")
+        user_list = UserService.query_user_by_email(username)
+        if not user_list:
+            raise UserNotFoundError(username)
+        if len(user_list) > 1:
+            raise AdminException(f"Exist more than 1 user: {username}!")
+        usr = user_list[0]
+        return delete_user_data(usr.id)
 
     @staticmethod
     def update_user_password(username, new_password) -> str:
@@ -134,7 +140,13 @@ class UserServiceMgr:
         tenants = TenantService.get_joined_tenants_by_user_id(usr.id)
         tenant_ids = [m["tenant_id"] for m in tenants]
         # filter permitted agents and owned agents
-        return UserCanvasService.get_all_agents_by_tenant_ids(tenant_ids, usr.id)
+        res = UserCanvasService.get_all_agents_by_tenant_ids(tenant_ids, usr.id)
+        return [{
+            'title': r['title'],
+            'permission': r['permission'],
+            'canvas_type': r['canvas_type'],
+            'canvas_category': r['canvas_category']
+        } for r in res]
 
 class ServiceMgr:
 
diff --git a/api/apps/canvas_app.py b/api/apps/canvas_app.py
index bba0d0094..57de77613 100644
--- a/api/apps/canvas_app.py
+++ b/api/apps/canvas_app.py
@@ -101,7 +101,7 @@ def save():
 def get(canvas_id):
     if not UserCanvasService.accessible(canvas_id, current_user.id):
         return get_data_error_result(message="canvas not found.")
-    e, c = UserCanvasService.get_by_tenant_id(canvas_id)
+    e, c = UserCanvasService.get_by_canvas_id(canvas_id)
     return get_json_result(data=c)
 
 
@@ -198,7 +198,7 @@ def reset():
 
 @manager.route("/upload/<canvas_id>", methods=["POST"])  # noqa: F821
 def upload(canvas_id):
-    e, cvs = UserCanvasService.get_by_tenant_id(canvas_id)
+    e, cvs = UserCanvasService.get_by_canvas_id(canvas_id)
     if not e:
         return get_data_error_result(message="canvas not found.")
 
diff --git a/api/apps/dataflow_app.py b/api/apps/dataflow_app.py
index 36ccf57a2..cb0fe98b3 100644
--- a/api/apps/dataflow_app.py
+++ b/api/apps/dataflow_app.py
@@ -94,7 +94,7 @@ def save():
 def get(canvas_id):
     if not UserCanvasService.accessible(canvas_id, current_user.id):
         return get_data_error_result(message="canvas not found.")
-    e, c = UserCanvasService.get_by_tenant_id(canvas_id)
+    e, c = UserCanvasService.get_by_canvas_id(canvas_id)
     return get_json_result(data=c)
 
 
@@ -161,7 +161,7 @@ def reset():
 
 @manager.route("/upload/<canvas_id>", methods=["POST"])  # noqa: F821
 def upload(canvas_id):
-    e, cvs = UserCanvasService.get_by_tenant_id(canvas_id)
+    e, cvs = UserCanvasService.get_by_canvas_id(canvas_id)
     if not e:
         return get_data_error_result(message="canvas not found.")
 
diff --git a/api/db/joint_services/user_account_service.py b/api/db/joint_services/user_account_service.py
index e94cf4776..61f23ccd5 100644
--- a/api/db/joint_services/user_account_service.py
+++ b/api/db/joint_services/user_account_service.py
@@ -17,13 +17,26 @@ import logging
 import uuid
 
 from api import settings
-from api.db import FileType, UserTenantRole
-from api.db.db_models import TenantLLM
+from api.utils.api_utils import group_by
+from api.db import FileType, UserTenantRole, ActiveEnum
+from api.db.services.api_service import APITokenService, API4ConversationService
+from api.db.services.canvas_service import UserCanvasService
+from api.db.services.conversation_service import ConversationService
+from api.db.services.dialog_service import DialogService
+from api.db.services.document_service import DocumentService
+from api.db.services.file2document_service import File2DocumentService
+from api.db.services.knowledgebase_service import KnowledgebaseService
+from api.db.services.langfuse_service import TenantLangfuseService
 from api.db.services.llm_service import get_init_tenant_llm
 from api.db.services.file_service import FileService
+from api.db.services.mcp_server_service import MCPServerService
+from api.db.services.search_service import SearchService
+from api.db.services.task_service import TaskService
 from api.db.services.tenant_llm_service import TenantLLMService
+from api.db.services.user_canvas_version import UserCanvasVersionService
 from api.db.services.user_service import TenantService, UserService, UserTenantService
-
+from rag.utils.storage_factory import STORAGE_IMPL
+from rag.nlp import search
 
 
 def create_new_user(user_info: dict) -> dict:
@@ -104,7 +117,7 @@ def create_new_user(user_info: dict) -> dict:
         except Exception as e:
             logging.exception(e)
         try:
-            TenantLLM.delete().where(TenantLLM.tenant_id == user_id).execute()
+            TenantLLMService.delete_by_tenant_id(user_id)
         except Exception as e:
             logging.exception(e)
         try:
@@ -118,3 +131,197 @@ def create_new_user(user_info: dict) -> dict:
             logging.exception(e)
         # reraise
         raise create_error
+
+
+def delete_user_data(user_id: str) -> dict:
+    # use user_id to delete
+    usr = UserService.filter_by_id(user_id)
+    if not usr:
+        return {"success": False, "message": f"{user_id} can't be found."}
+    # check is inactive and not admin
+    if usr.is_active == ActiveEnum.ACTIVE.value:
+        return {"success": False, "message": f"{user_id} is active and can't be deleted."}
+    if usr.is_superuser:
+        return {"success": False, "message": "Can't delete the super user."}
+    # tenant info
+    tenants = UserTenantService.get_user_tenant_relation_by_user_id(usr.id)
+    owned_tenant = [t for t in tenants if t["role"] == UserTenantRole.OWNER.value]
+
+    done_msg = ''
+    try:
+        # step1. delete owned tenant info
+        if owned_tenant:
+            done_msg += "Start to delete owned tenant.\n"
+            tenant_id = owned_tenant[0]["tenant_id"]
+            kb_ids = KnowledgebaseService.get_kb_ids(usr.id)
+            # step1.1 delete knowledgebase related file and info
+            if kb_ids:
+                # step1.1.1 delete files in storage, remove bucket
+                for kb_id in kb_ids:
+                    if STORAGE_IMPL.bucket_exists(kb_id):
+                        STORAGE_IMPL.remove_bucket(kb_id)
+                done_msg += f"- Removed {len(kb_ids)} dataset's buckets.\n"
+                # step1.1.2 delete file and document info in db
+                doc_ids = DocumentService.get_all_doc_ids_by_kb_ids(kb_ids)
+                if doc_ids:
+                    doc_delete_res = DocumentService.delete_by_ids([i["id"] for i in doc_ids])
+                    done_msg += f"- Deleted {doc_delete_res} document records.\n"
+                    task_delete_res = TaskService.delete_by_doc_ids([i["id"] for i in doc_ids])
+                    done_msg += f"- Deleted {task_delete_res} task records.\n"
+                file_ids = FileService.get_all_file_ids_by_tenant_id(usr.id)
+                if file_ids:
+                    file_delete_res = FileService.delete_by_ids([f["id"] for f in file_ids])
+                    done_msg += f"- Deleted {file_delete_res} file records.\n"
+                if doc_ids or file_ids:
+                    file2doc_delete_res = File2DocumentService.delete_by_document_ids_or_file_ids(
+                        [i["id"] for i in doc_ids],
+                        [f["id"] for f in file_ids]
+                    )
+                    done_msg += f"- Deleted {file2doc_delete_res} document-file relation records.\n"
+                # step1.1.3 delete chunk in es
+                r = settings.docStoreConn.delete({"kb_id": kb_ids},
+                                         search.index_name(tenant_id), kb_ids)
+                done_msg += f"- Deleted {r} chunk records.\n"
+                kb_delete_res = KnowledgebaseService.delete_by_ids(kb_ids)
+                done_msg += f"- Deleted {kb_delete_res} knowledgebase records.\n"
+                # step1.1.4 delete agents
+                agent_delete_res = delete_user_agents(usr.id)
+                done_msg += f"- Deleted {agent_delete_res['agents_deleted_count']} agent, {agent_delete_res['version_deleted_count']} versions records.\n"
+                # step1.1.5 delete dialogs
+                dialog_delete_res = delete_user_dialogs(usr.id)
+                done_msg += f"- Deleted {dialog_delete_res['dialogs_deleted_count']} dialogs, {dialog_delete_res['conversations_deleted_count']} conversations, {dialog_delete_res['api_token_deleted_count']} api tokens, {dialog_delete_res['api4conversation_deleted_count']} api4conversations.\n"
+                # step1.1.6 delete mcp server
+                mcp_delete_res = MCPServerService.delete_by_tenant_id(usr.id)
+                done_msg += f"- Deleted {mcp_delete_res} MCP server.\n"
+                # step1.1.7 delete search
+                search_delete_res = SearchService.delete_by_tenant_id(usr.id)
+                done_msg += f"- Deleted {search_delete_res} search records.\n"
+            # step1.2 delete tenant_llm and tenant_langfuse
+            llm_delete_res = TenantLLMService.delete_by_tenant_id(tenant_id)
+            done_msg += f"- Deleted {llm_delete_res} tenant-LLM records.\n"
+            langfuse_delete_res = TenantLangfuseService.delete_ty_tenant_id(tenant_id)
+            done_msg += f"- Deleted {langfuse_delete_res} langfuse records.\n"
+            # step1.3 delete own tenant
+            tenant_delete_res = TenantService.delete_by_id(tenant_id)
+            done_msg += f"- Deleted {tenant_delete_res} tenant.\n"
+        # step2 delete user-tenant relation
+        if tenants:
+            # step2.1 delete docs and files in joined team
+            joined_tenants = [t for t in tenants if t["role"] == UserTenantRole.NORMAL.value]
+            if joined_tenants:
+                done_msg += "Start to delete data in joined tenants.\n"
+                created_documents = DocumentService.get_all_docs_by_creator_id(usr.id)
+                if created_documents:
+                    # step2.1.1 delete files
+                    doc_file_info = File2DocumentService.get_by_document_ids([d['id'] for d in created_documents])
+                    created_files = FileService.get_by_ids([f['file_id'] for f in doc_file_info])
+                    if created_files:
+                        # step2.1.1.1 delete file in storage
+                        for f in created_files:
+                            STORAGE_IMPL.rm(f.parent_id, f.location)
+                        done_msg += f"- Deleted {len(created_files)} uploaded file.\n"
+                        # step2.1.1.2 delete file record
+                        file_delete_res = FileService.delete_by_ids([f.id for f in created_files])
+                        done_msg += f"- Deleted {file_delete_res} file records.\n"
+                    # step2.1.2 delete document-file relation record
+                    file2doc_delete_res = File2DocumentService.delete_by_document_ids_or_file_ids(
+                        [d['id'] for d in created_documents],
+                        [f.id for f in created_files]
+                    )
+                    done_msg += f"- Deleted {file2doc_delete_res} document-file relation records.\n"
+                    # step2.1.3 delete chunks
+                    doc_groups = group_by(created_documents, "tenant_id")
+                    kb_grouped_doc = {k: group_by(v, "kb_id") for k, v in doc_groups.items()}
+                    # chunks in {'tenant_id': {'kb_id': [{'id': doc_id}]}} structure
+                    chunk_delete_res = 0
+                    kb_doc_info = {}
+                    for _tenant_id, kb_doc in kb_grouped_doc.items():
+                        for _kb_id, docs in kb_doc.items():
+                            chunk_delete_res += settings.docStoreConn.delete(
+                                {"doc_id": [d["id"] for d in docs]},
+                                search.index_name(_tenant_id), _kb_id
+                            )
+                            # record doc info
+                            if _kb_id in kb_doc_info.keys():
+                                kb_doc_info[_kb_id]['doc_num'] += 1
+                                kb_doc_info[_kb_id]['token_num'] += sum([d["token_num"] for d in docs])
+                                kb_doc_info[_kb_id]['chunk_num'] += sum([d["chunk_num"] for d in docs])
+                            else:
+                                kb_doc_info[_kb_id] = {
+                                    'doc_num': 1,
+                                    'token_num': sum([d["token_num"] for d in docs]),
+                                    'chunk_num': sum([d["chunk_num"] for d in docs])
+                                }
+                    done_msg += f"- Deleted {chunk_delete_res} chunks.\n"
+                    # step2.1.4 delete tasks
+                    task_delete_res = TaskService.delete_by_doc_ids([d['id'] for d in created_documents])
+                    done_msg += f"- Deleted {task_delete_res} tasks.\n"
+                    # step2.1.5 delete document record
+                    doc_delete_res = DocumentService.delete_by_ids([d['id'] for d in created_documents])
+                    done_msg += f"- Deleted {doc_delete_res} documents.\n"
+                    # step2.1.6 update knowledge base doc&chunk&token cnt
+                    for kb_id, doc_num in kb_doc_info.items():
+                        KnowledgebaseService.decrease_document_num_in_delete(kb_id, doc_num)
+
+            # step2.2 delete relation
+            user_tenant_delete_res = UserTenantService.delete_by_ids([t["id"] for t in tenants])
+            done_msg += f"- Deleted {user_tenant_delete_res} user-tenant records.\n"
+        # step3 finally delete user
+        user_delete_res = UserService.delete_by_id(usr.id)
+        done_msg += f"- Deleted {user_delete_res} user.\nDelete done!"
+
+        return {"success": True, "message": f"Successfully deleted user. Details:\n{done_msg}"}
+
+    except Exception as e:
+        logging.exception(e)
+        return {"success": False, "message": f"Error: {str(e)}. Already done:\n{done_msg}"}
+
+
+def delete_user_agents(user_id: str) -> dict:
+    """
+    use user_id to delete
+    :return: {
+        "agents_deleted_count": 1,
+        "version_deleted_count": 2
+    }
+    """
+    agents_deleted_count, agents_version_deleted_count = 0, 0
+    user_agents = UserCanvasService.get_all_agents_by_tenant_ids([user_id], user_id)
+    if user_agents:
+        agents_version = UserCanvasVersionService.get_all_canvas_version_by_canvas_ids([a['id'] for a in user_agents])
+        agents_version_deleted_count = UserCanvasVersionService.delete_by_ids([v['id'] for v in agents_version])
+        agents_deleted_count = UserCanvasService.delete_by_ids([a['id'] for a in user_agents])
+    return {
+        "agents_deleted_count": agents_deleted_count,
+        "version_deleted_count": agents_version_deleted_count
+    }
+
+
+def delete_user_dialogs(user_id: str) -> dict:
+    """
+    use user_id to delete
+    :return: {
+        "dialogs_deleted_count": 1,
+        "conversations_deleted_count": 1,
+        "api_token_deleted_count": 2,
+        "api4conversation_deleted_count": 2
+    }
+    """
+    dialog_deleted_count, conversations_deleted_count, api_token_deleted_count, api4conversation_deleted_count = 0, 0, 0, 0
+    user_dialogs = DialogService.get_all_dialogs_by_tenant_id(user_id)
+    if user_dialogs:
+        # delete conversation
+        conversations = ConversationService.get_all_conversation_by_dialog_ids([ud['id'] for ud in user_dialogs])
+        conversations_deleted_count = ConversationService.delete_by_ids([c['id'] for c in conversations])
+        # delete api token
+        api_token_deleted_count = APITokenService.delete_by_tenant_id(user_id)
+        # delete api for conversation
+        api4conversation_deleted_count = API4ConversationService.delete_by_dialog_ids([ud['id'] for ud in user_dialogs])
+        # delete dialog at last
+        dialog_deleted_count = DialogService.delete_by_ids([ud['id'] for ud in user_dialogs])
+    return {
+        "dialogs_deleted_count": dialog_deleted_count,
+        "conversations_deleted_count": conversations_deleted_count,
+        "api_token_deleted_count": api_token_deleted_count,
+        "api4conversation_deleted_count": api4conversation_deleted_count
+    }
diff --git a/api/db/services/api_service.py b/api/db/services/api_service.py
index 2fcbe0329..9a23547f7 100644
--- a/api/db/services/api_service.py
+++ b/api/db/services/api_service.py
@@ -35,6 +35,11 @@ class APITokenService(CommonService):
             cls.model.token == token
         )
 
+    @classmethod
+    @DB.connection_context()
+    def delete_by_tenant_id(cls, tenant_id):
+        return cls.model.delete().where(cls.model.tenant_id == tenant_id).execute()
+
 
 class API4ConversationService(CommonService):
     model = API4Conversation
@@ -100,3 +105,8 @@ class API4ConversationService(CommonService):
             cls.model.create_date <= to_date,
             cls.model.source == source
         ).group_by(cls.model.create_date.truncate("day")).dicts()
+
+    @classmethod
+    @DB.connection_context()
+    def delete_by_dialog_ids(cls, dialog_ids):
+        return cls.model.delete().where(cls.model.dialog_id.in_(dialog_ids)).execute()
diff --git a/api/db/services/canvas_service.py b/api/db/services/canvas_service.py
index 800a71187..7b2150c3c 100644
--- a/api/db/services/canvas_service.py
+++ b/api/db/services/canvas_service.py
@@ -66,6 +66,7 @@ class UserCanvasService(CommonService):
     def get_all_agents_by_tenant_ids(cls, tenant_ids, user_id):
         # will get all permitted agents, be cautious
         fields = [
+            cls.model.id,
             cls.model.title,
             cls.model.permission,
             cls.model.canvas_type,
@@ -93,7 +94,7 @@ class UserCanvasService(CommonService):
 
     @classmethod
     @DB.connection_context()
-    def get_by_tenant_id(cls, pid):
+    def get_by_canvas_id(cls, pid):
         try:
 
             fields = [
@@ -165,7 +166,7 @@ class UserCanvasService(CommonService):
     @DB.connection_context()
     def accessible(cls, canvas_id, tenant_id):
         from api.db.services.user_service import UserTenantService
-        e, c = UserCanvasService.get_by_tenant_id(canvas_id)
+        e, c = UserCanvasService.get_by_canvas_id(canvas_id)
         if not e:
             return False
 
diff --git a/api/db/services/conversation_service.py b/api/db/services/conversation_service.py
index 26361fc7b..53913f442 100644
--- a/api/db/services/conversation_service.py
+++ b/api/db/services/conversation_service.py
@@ -48,6 +48,21 @@ class ConversationService(CommonService):
 
         return list(sessions.dicts())
 
+    @classmethod
+    @DB.connection_context()
+    def get_all_conversation_by_dialog_ids(cls, dialog_ids):
+        sessions = cls.model.select().where(cls.model.dialog_id.in_(dialog_ids))
+        sessions.order_by(cls.model.create_time.asc())
+        offset, limit = 0, 100
+        res = []
+        while True:
+            s_batch = sessions.offset(offset).limit(limit)
+            _temp = list(s_batch.dicts())
+            if not _temp:
+                break
+            res.extend(_temp)
+            offset += limit
+        return res
 
 def structure_answer(conv, ans, message_id, session_id):
     reference = ans["reference"]
diff --git a/api/db/services/dialog_service.py b/api/db/services/dialog_service.py
index a51d6b925..673000ff9 100644
--- a/api/db/services/dialog_service.py
+++ b/api/db/services/dialog_service.py
@@ -159,6 +159,22 @@ class DialogService(CommonService):
 
         return list(dialogs.dicts()), count
 
+    @classmethod
+    @DB.connection_context()
+    def get_all_dialogs_by_tenant_id(cls, tenant_id):
+        fields = [cls.model.id]
+        dialogs = cls.model.select(*fields).where(cls.model.tenant_id == tenant_id)
+        dialogs.order_by(cls.model.create_time.asc())
+        offset, limit = 0, 100
+        res = []
+        while True:
+            d_batch = dialogs.offset(offset).limit(limit)
+            _temp = list(d_batch.dicts())
+            if not _temp:
+                break
+            res.extend(_temp)
+            offset += limit
+        return res
 
 def chat_solo(dialog, messages, stream=True):
     if TenantLLMService.llm_id2llm_type(dialog.llm_id) == "image2text":
diff --git a/api/db/services/document_service.py b/api/db/services/document_service.py
index ffb373d96..9624bf4dc 100644
--- a/api/db/services/document_service.py
+++ b/api/db/services/document_service.py
@@ -228,6 +228,46 @@ class DocumentService(CommonService):
 
         return int(query.scalar()) or 0
 
+    @classmethod
+    @DB.connection_context()
+    def get_all_doc_ids_by_kb_ids(cls, kb_ids):
+        fields = [cls.model.id]
+        docs = cls.model.select(*fields).where(cls.model.kb_id.in_(kb_ids))
+        docs.order_by(cls.model.create_time.asc())
+        # maybe cause slow query by deep paginate, optimize later
+        offset, limit = 0, 100
+        res = []
+        while True:
+            doc_batch = docs.offset(offset).limit(limit)
+            _temp = list(doc_batch.dicts())
+            if not _temp:
+                break
+            res.extend(_temp)
+            offset += limit
+        return res
+
+    @classmethod
+    @DB.connection_context()
+    def get_all_docs_by_creator_id(cls, creator_id):
+        fields = [
+            cls.model.id, cls.model.kb_id, cls.model.token_num, cls.model.chunk_num, Knowledgebase.tenant_id
+        ]
+        docs = cls.model.select(*fields).join(Knowledgebase, on=(Knowledgebase.id == cls.model.kb_id)).where(
+            cls.model.created_by == creator_id
+        )
+        docs.order_by(cls.model.create_time.asc())
+        # maybe cause slow query by deep paginate, optimize later
+        offset, limit = 0, 100
+        res = []
+        while True:
+            doc_batch = docs.offset(offset).limit(limit)
+            _temp = list(doc_batch.dicts())
+            if not _temp:
+                break
+            res.extend(_temp)
+            offset += limit
+        return res
+
     @classmethod
     @DB.connection_context()
     def insert(cls, doc):
diff --git a/api/db/services/file2document_service.py b/api/db/services/file2document_service.py
index c03dbf928..31d75accd 100644
--- a/api/db/services/file2document_service.py
+++ b/api/db/services/file2document_service.py
@@ -38,6 +38,12 @@ class File2DocumentService(CommonService):
         objs = cls.model.select().where(cls.model.document_id == document_id)
         return objs
 
+    @classmethod
+    @DB.connection_context()
+    def get_by_document_ids(cls, document_ids):
+        objs = cls.model.select().where(cls.model.document_id.in_(document_ids))
+        return list(objs.dicts())
+
     @classmethod
     @DB.connection_context()
     def insert(cls, obj):
@@ -50,6 +56,15 @@ class File2DocumentService(CommonService):
     def delete_by_file_id(cls, file_id):
         return cls.model.delete().where(cls.model.file_id == file_id).execute()
 
+    @classmethod
+    @DB.connection_context()
+    def delete_by_document_ids_or_file_ids(cls, document_ids, file_ids):
+        if not document_ids:
+            return cls.model.delete().where(cls.model.file_id.in_(file_ids)).execute()
+        elif not file_ids:
+            return cls.model.delete().where(cls.model.document_id.in_(document_ids)).execute()
+        return cls.model.delete().where(cls.model.document_id.in_(document_ids) | cls.model.file_id.in_(file_ids)).execute()
+
     @classmethod
     @DB.connection_context()
     def delete_by_document_id(cls, doc_id):
diff --git a/api/db/services/file_service.py b/api/db/services/file_service.py
index 24f923d38..e65e34cc5 100644
--- a/api/db/services/file_service.py
+++ b/api/db/services/file_service.py
@@ -161,6 +161,23 @@ class FileService(CommonService):
             result_ids.append(folder_id)
         return result_ids
 
+    @classmethod
+    @DB.connection_context()
+    def get_all_file_ids_by_tenant_id(cls, tenant_id):
+        fields = [cls.model.id]
+        files = cls.model.select(*fields).where(cls.model.tenant_id == tenant_id)
+        files.order_by(cls.model.create_time.asc())
+        offset, limit = 0, 100
+        res = []
+        while True:
+            file_batch = files.offset(offset).limit(limit)
+            _temp = list(file_batch.dicts())
+            if not _temp:
+                break
+            res.extend(_temp)
+            offset += limit
+        return res
+
     @classmethod
     @DB.connection_context()
     def create_folder(cls, file, parent_id, name, count):
diff --git a/api/db/services/knowledgebase_service.py b/api/db/services/knowledgebase_service.py
index a49ab7701..d0bd8faa4 100644
--- a/api/db/services/knowledgebase_service.py
+++ b/api/db/services/knowledgebase_service.py
@@ -471,3 +471,17 @@ class KnowledgebaseService(CommonService):
             else:
                 raise e
 
+    @classmethod
+    @DB.connection_context()
+    def decrease_document_num_in_delete(cls, kb_id, doc_num_info: dict):
+        kb_row = cls.model.get_by_id(kb_id)
+        if not kb_row:
+            raise RuntimeError(f"kb_id {kb_id} does not exist")
+        update_dict = {
+            'doc_num': kb_row.doc_num - doc_num_info['doc_num'],
+            'chunk_num': kb_row.chunk_num - doc_num_info['chunk_num'],
+            'token_num': kb_row.token_num - doc_num_info['token_num'],
+            'update_time': current_timestamp(),
+            'update_date': datetime_format(datetime.now())
+        }
+        return cls.model.update(update_dict).where(cls.model.id == kb_id).execute()
diff --git a/api/db/services/langfuse_service.py b/api/db/services/langfuse_service.py
index c75f3d12e..6f4646900 100644
--- a/api/db/services/langfuse_service.py
+++ b/api/db/services/langfuse_service.py
@@ -51,6 +51,11 @@ class TenantLangfuseService(CommonService):
         except peewee.DoesNotExist:
             return None
 
+    @classmethod
+    @DB.connection_context()
+    def delete_ty_tenant_id(cls, tenant_id):
+        return cls.model.delete().where(cls.model.tenant_id == tenant_id).execute()
+
     @classmethod
     def update_by_tenant(cls, tenant_id, langfuse_keys):
         langfuse_keys["update_time"] = current_timestamp()
diff --git a/api/db/services/mcp_server_service.py b/api/db/services/mcp_server_service.py
index 869350094..101555f4b 100644
--- a/api/db/services/mcp_server_service.py
+++ b/api/db/services/mcp_server_service.py
@@ -84,3 +84,8 @@ class MCPServerService(CommonService):
             return bool(mcp_server), mcp_server
         except Exception:
             return False, None
+
+    @classmethod
+    @DB.connection_context()
+    def delete_by_tenant_id(cls, tenant_id: str):
+        return cls.model.delete().where(cls.model.tenant_id == tenant_id).execute()
diff --git a/api/db/services/search_service.py b/api/db/services/search_service.py
index 674cfcf1f..acb07da57 100644
--- a/api/db/services/search_service.py
+++ b/api/db/services/search_service.py
@@ -110,3 +110,8 @@ class SearchService(CommonService):
             query = query.paginate(page_number, items_per_page)
 
         return list(query.dicts()), count
+
+    @classmethod
+    @DB.connection_context()
+    def delete_by_tenant_id(cls, tenant_id):
+        return cls.model.delete().where(cls.model.tenant_id == tenant_id).execute()
diff --git a/api/db/services/task_service.py b/api/db/services/task_service.py
index 46087f8ba..07cfbb600 100644
--- a/api/db/services/task_service.py
+++ b/api/db/services/task_service.py
@@ -308,6 +308,12 @@ class TaskService(CommonService):
                     )
                 ).execute()
 
+    @classmethod
+    @DB.connection_context()
+    def delete_by_doc_ids(cls, doc_ids):
+        """Delete task associated with a document."""
+        return cls.model.delete().where(cls.model.doc_id.in_(doc_ids)).execute()
+
 
 def queue_tasks(doc: dict, bucket: str, name: str, priority: int):
     """Create and queue document processing tasks.
diff --git a/api/db/services/tenant_llm_service.py b/api/db/services/tenant_llm_service.py
index ec023f115..4eca970ec 100644
--- a/api/db/services/tenant_llm_service.py
+++ b/api/db/services/tenant_llm_service.py
@@ -209,6 +209,11 @@ class TenantLLMService(CommonService):
         objs = cls.model.select().where((cls.model.llm_factory == "OpenAI"), ~(cls.model.llm_name == "text-embedding-3-small"), ~(cls.model.llm_name == "text-embedding-3-large")).dicts()
         return list(objs)
 
+    @classmethod
+    @DB.connection_context()
+    def delete_by_tenant_id(cls, tenant_id):
+        return cls.model.delete().where(cls.model.tenant_id == tenant_id).execute()
+
     @staticmethod
     def llm_id2llm_type(llm_id: str) -> str | None:
         from api.db.services.llm_service import LLMService
diff --git a/api/db/services/user_canvas_version.py b/api/db/services/user_canvas_version.py
index 9fe12e32e..9696a7834 100644
--- a/api/db/services/user_canvas_version.py
+++ b/api/db/services/user_canvas_version.py
@@ -24,7 +24,24 @@ class UserCanvasVersionService(CommonService):
             return None
         except Exception:
             return None
-    
+
+    @classmethod
+    @DB.connection_context()
+    def get_all_canvas_version_by_canvas_ids(cls, canvas_ids):
+        fields = [cls.model.id]
+        versions = cls.model.select(*fields).where(cls.model.user_canvas_id.in_(canvas_ids))
+        versions.order_by(cls.model.create_time.asc())
+        offset, limit = 0, 100
+        res = []
+        while True:
+            version_batch = versions.offset(offset).limit(limit)
+            _temp = list(version_batch.dicts())
+            if not _temp:
+                break
+            res.extend(_temp)
+            offset += limit
+        return res
+
     @classmethod
     @DB.connection_context()
     def delete_all_versions(cls, user_canvas_id):
diff --git a/api/db/services/user_service.py b/api/db/services/user_service.py
index a0b3ea843..12c405bd6 100644
--- a/api/db/services/user_service.py
+++ b/api/db/services/user_service.py
@@ -288,6 +288,17 @@ class UserTenantService(CommonService):
                     .join(User, on=((cls.model.tenant_id == User.id) & (UserTenant.user_id == user_id) & (UserTenant.status == StatusEnum.VALID.value)))
                     .where(cls.model.status == StatusEnum.VALID.value).dicts())
 
+    @classmethod
+    @DB.connection_context()
+    def get_user_tenant_relation_by_user_id(cls, user_id):
+        fields = [
+            cls.model.id,
+            cls.model.user_id,
+            cls.model.tenant_id,
+            cls.model.role
+        ]
+        return list(cls.model.select(*fields).where(cls.model.user_id == user_id).dicts().dicts())
+
     @classmethod
     @DB.connection_context()
     def get_num_members(cls, user_id: str):
diff --git a/api/utils/api_utils.py b/api/utils/api_utils.py
index 1aaaee997..1b7452495 100644
--- a/api/utils/api_utils.py
+++ b/api/utils/api_utils.py
@@ -659,6 +659,16 @@ def remap_dictionary_keys(source_data: dict, key_aliases: dict = None) -> dict:
     return transformed_data
 
 
+def group_by(list_of_dict, key):
+    res = {}
+    for item in list_of_dict:
+        if item[key] in res.keys():
+            res[item[key]].append(item)
+        else:
+            res[item[key]] = [item]
+    return res
+
+
 def get_mcp_tools(mcp_servers: list, timeout: float | int = 10) -> tuple[dict, str]:
     results = {}
     tool_call_sessions = []
diff --git a/rag/utils/minio_conn.py b/rag/utils/minio_conn.py
index 80a723a5c..c26e5606d 100644
--- a/rag/utils/minio_conn.py
+++ b/rag/utils/minio_conn.py
@@ -108,6 +108,19 @@ class RAGFlowMinio:
             logging.exception(f"obj_exist {bucket}/{filename} got exception")
             return False
 
+    def bucket_exists(self, bucket):
+        try:
+            if not self.conn.bucket_exists(bucket):
+                return False
+            else:
+                return True
+        except S3Error as e:
+            if e.code in ["NoSuchKey", "NoSuchBucket", "ResourceNotFound"]:
+                return False
+        except Exception:
+            logging.exception(f"bucket_exist {bucket} got exception")
+            return False
+
     def get_presigned_url(self, bucket, fnm, expires):
         for _ in range(10):
             try: