diff --git a/deepdoc/parser/excel_parser.py b/deepdoc/parser/excel_parser.py
index 2c3e67757..736ac32ef 100644
--- a/deepdoc/parser/excel_parser.py
+++ b/deepdoc/parser/excel_parser.py
@@ -69,7 +69,7 @@ class RAGFlowExcelParser:
 
         if fnm.split(".")[-1].lower() in ["csv", "txt"]:
             encoding = find_codec(binary)
-            txt = binary.decode(encoding)
+            txt = binary.decode(encoding, errors="ignore")
             return len(txt.split("\n"))
 
 
diff --git a/rag/app/book.py b/rag/app/book.py
index 70aee29c2..c4bc62abf 100644
--- a/rag/app/book.py
+++ b/rag/app/book.py
@@ -91,7 +91,7 @@ def chunk(filename, binary=None, from_page=0, to_page=100000,
         txt = ""
         if binary:
             encoding = find_codec(binary)
-            txt = binary.decode(encoding)
+            txt = binary.decode(encoding, errors="ignore")
         else:
             with open(filename, "r") as f:
                 while True:
diff --git a/rag/app/laws.py b/rag/app/laws.py
index 473eca9c7..6361d62cb 100644
--- a/rag/app/laws.py
+++ b/rag/app/laws.py
@@ -113,7 +113,7 @@ def chunk(filename, binary=None, from_page=0, to_page=100000,
         txt = ""
         if binary:
             encoding = find_codec(binary)
-            txt = binary.decode(encoding)
+            txt = binary.decode(encoding, errors="ignore")
         else:
             with open(filename, "r") as f:
                 while True:
diff --git a/rag/app/naive.py b/rag/app/naive.py
index 55fab84c2..c557a6267 100644
--- a/rag/app/naive.py
+++ b/rag/app/naive.py
@@ -141,7 +141,7 @@ def chunk(filename, binary=None, from_page=0, to_page=100000,
         txt = ""
         if binary:
             encoding = find_codec(binary)
-            txt = binary.decode(encoding)
+            txt = binary.decode(encoding, errors="ignore")
         else:
             with open(filename, "r") as f:
                 while True:
diff --git a/rag/app/one.py b/rag/app/one.py
index f5c78f5aa..531fd0a70 100644
--- a/rag/app/one.py
+++ b/rag/app/one.py
@@ -85,7 +85,7 @@ def chunk(filename, binary=None, from_page=0, to_page=100000,
         txt = ""
         if binary:
             encoding = find_codec(binary)
-            txt = binary.decode(encoding)
+            txt = binary.decode(encoding, errors="ignore")
         else:
             with open(filename, "r") as f:
                 while True:
diff --git a/rag/app/qa.py b/rag/app/qa.py
index a37ff63fd..1ecf9b187 100644
--- a/rag/app/qa.py
+++ b/rag/app/qa.py
@@ -107,7 +107,7 @@ def chunk(filename, binary=None, lang="Chinese", callback=None, **kwargs):
         txt = ""
         if binary:
             encoding = find_codec(binary)
-            txt = binary.decode(encoding)
+            txt = binary.decode(encoding, errors="ignore")
         else:
             with open(filename, "r") as f:
                 while True:
diff --git a/rag/app/table.py b/rag/app/table.py
index 96a53aac4..368d1ce85 100644
--- a/rag/app/table.py
+++ b/rag/app/table.py
@@ -149,7 +149,7 @@ def chunk(filename, binary=None, from_page=0, to_page=10000000000,
         txt = ""
         if binary:
             encoding = find_codec(binary)
-            txt = binary.decode(encoding)
+            txt = binary.decode(encoding, errors="ignore")
         else:
             with open(filename, "r") as f:
                 while True: