diff --git a/README-zh.md b/README-zh.md
index 8b377e0e..9f7f314e 100644
--- a/README-zh.md
+++ b/README-zh.md
@@ -242,7 +242,6 @@ if __name__ == "__main__":
 | **tokenizer** | `Tokenizer` | 用于将文本转换为 tokens（数字）以及使用遵循 TokenizerInterface 协议的 .encode() 和 .decode() 函数将 tokens 转换回文本的函数。 如果您不指定，它将使用默认的 Tiktoken tokenizer。 | `TiktokenTokenizer` |
 | **tiktoken_model_name** | `str` | 如果您使用的是默认的 Tiktoken tokenizer，那么这是要使用的特定 Tiktoken 模型的名称。如果您提供自己的 tokenizer，则忽略此设置。 | `gpt-4o-mini` |
 | **entity_extract_max_gleaning** | `int` | 实体提取过程中的循环次数，附加历史消息 | `1` |
-| **entity_summary_to_max_tokens** | `int` | 每个实体摘要的最大令牌大小 | `500` |
 | **node_embedding_algorithm** | `str` | 节点嵌入算法（当前未使用） | `node2vec` |
 | **node2vec_params** | `dict` | 节点嵌入的参数 | `{"dimensions": 1536,"num_walks": 10,"walk_length": 40,"window_size": 2,"iterations": 3,"random_seed": 3,}` |
 | **embedding_func** | `EmbeddingFunc` | 从文本生成嵌入向量的函数 | `openai_embed` |
diff --git a/README.md b/README.md
index 5d8a642f..fa2b5924 100644
--- a/README.md
+++ b/README.md
@@ -249,7 +249,6 @@ A full list of LightRAG init parameters:
 | **tokenizer** | `Tokenizer` | The function used to convert text into tokens (numbers) and back using .encode() and .decode() functions following `TokenizerInterface` protocol. If you don't specify one, it will use the default Tiktoken tokenizer. | `TiktokenTokenizer` |
 | **tiktoken_model_name** | `str` | If you're using the default Tiktoken tokenizer, this is the name of the specific Tiktoken model to use. This setting is ignored if you provide your own tokenizer. | `gpt-4o-mini` |
 | **entity_extract_max_gleaning** | `int` | Number of loops in the entity extraction process, appending history messages | `1` |
-| **entity_summary_to_max_tokens** | `int` | Maximum token size for each entity summary | `500` |
 | **node_embedding_algorithm** | `str` | Algorithm for node embedding (currently not used) | `node2vec` |
 | **node2vec_params** | `dict` | Parameters for node embedding | `{"dimensions": 1536,"num_walks": 10,"walk_length": 40,"window_size": 2,"iterations": 3,"random_seed": 3,}` |
 | **embedding_func** | `EmbeddingFunc` | Function to generate embedding vectors from text | `openai_embed` |
diff --git a/env.example b/env.example
index f8f6d614..828c6d24 100644
--- a/env.example
+++ b/env.example
@@ -72,8 +72,6 @@ OLLAMA_EMULATING_MODEL_TAG=latest
 SUMMARY_LANGUAGE=English
 ### Number of duplicated entities/edges to trigger LLM re-summary on merge ( at least 3 is recommented)
 # FORCE_LLM_SUMMARY_ON_MERGE=6
-### Max tokens for entity/relations description after merge
-# MAX_TOKEN_SUMMARY=500
 ### Maximum number of entity extraction attempts for ambiguous content
 # MAX_GLEANING=1
 
diff --git a/lightrag/api/utils_api.py b/lightrag/api/utils_api.py
index a724069d..b7099bb3 100644
--- a/lightrag/api/utils_api.py
+++ b/lightrag/api/utils_api.py
@@ -10,7 +10,6 @@ from ascii_colors import ASCIIColors
 from lightrag.api import __api_version__ as api_version
 from lightrag import __version__ as core_version
 from lightrag.constants import (
-    DEFAULT_MAX_TOKEN_SUMMARY,
     DEFAULT_FORCE_LLM_SUMMARY_ON_MERGE,
 )
 from fastapi import HTTPException, Security, Request, status
@@ -280,9 +279,6 @@ def display_splash_screen(args: argparse.Namespace) -> None:
     ASCIIColors.white("    ├─ Top-K: ", end="")
     ASCIIColors.yellow(f"{args.top_k}")
     ASCIIColors.white("    ├─ Max Token Summary: ", end="")
-    ASCIIColors.yellow(
-        f"{get_env_value('MAX_TOKEN_SUMMARY', DEFAULT_MAX_TOKEN_SUMMARY, int)}"
-    )
     ASCIIColors.white("    └─ Force LLM Summary on Merge: ", end="")
     ASCIIColors.yellow(
         f"{get_env_value('FORCE_LLM_SUMMARY_ON_MERGE', DEFAULT_FORCE_LLM_SUMMARY_ON_MERGE, int)}"
diff --git a/lightrag/constants.py b/lightrag/constants.py
index 82451a36..c3fd6531 100644
--- a/lightrag/constants.py
+++ b/lightrag/constants.py
@@ -8,8 +8,7 @@ consistency and makes maintenance easier.
 
 # Default values for environment variables
 DEFAULT_MAX_GLEANING = 1
-DEFAULT_MAX_TOKEN_SUMMARY = 500
-DEFAULT_FORCE_LLM_SUMMARY_ON_MERGE = 6
+DEFAULT_FORCE_LLM_SUMMARY_ON_MERGE = 4
 DEFAULT_WOKERS = 2
 DEFAULT_TIMEOUT = 150
 
diff --git a/lightrag/lightrag.py b/lightrag/lightrag.py
index b6cca32a..6ee61e2d 100644
--- a/lightrag/lightrag.py
+++ b/lightrag/lightrag.py
@@ -23,7 +23,6 @@ from typing import (
 )
 from lightrag.constants import (
     DEFAULT_MAX_GLEANING,
-    DEFAULT_MAX_TOKEN_SUMMARY,
     DEFAULT_FORCE_LLM_SUMMARY_ON_MERGE,
 )
 from lightrag.utils import get_env_value
@@ -134,10 +133,6 @@ class LightRAG:
     )
     """Maximum number of entity extraction attempts for ambiguous content."""
 
-    summary_to_max_tokens: int = field(
-        default=get_env_value("MAX_TOKEN_SUMMARY", DEFAULT_MAX_TOKEN_SUMMARY, int)
-    )
-
     force_llm_summary_on_merge: int = field(
         default=get_env_value(
             "FORCE_LLM_SUMMARY_ON_MERGE", DEFAULT_FORCE_LLM_SUMMARY_ON_MERGE, int
diff --git a/lightrag/operate.py b/lightrag/operate.py
index 49de3c71..4bf579d1 100644
--- a/lightrag/operate.py
+++ b/lightrag/operate.py
@@ -118,7 +118,6 @@ async def _handle_entity_relation_summary(
 
     tokenizer: Tokenizer = global_config["tokenizer"]
     llm_max_tokens = global_config["llm_model_max_token_size"]
-    # summary_max_tokens = global_config["summary_to_max_tokens"]
 
     language = global_config["addon_params"].get(
         "language", PROMPTS["DEFAULT_LANGUAGE"]