diff --git a/api/apps/sdk/doc.py b/api/apps/sdk/doc.py
index bd8c60c74..6ecb2fa97 100644
--- a/api/apps/sdk/doc.py
+++ b/api/apps/sdk/doc.py
@@ -136,6 +136,10 @@ def upload(dataset_id, tenant_id):
             return get_result(
                 message="No file selected!", code=settings.RetCode.ARGUMENT_ERROR
             )
+        if len(file_obj.filename.encode("utf-8")) >= 128:
+            return get_result(
+                message="File name should be less than 128 bytes.", code=settings.RetCode.ARGUMENT_ERROR
+            )
     '''
     # total size
     total_size = 0
@@ -246,6 +250,11 @@ def update_doc(tenant_id, dataset_id, document_id):
         DocumentService.update_meta_fields(document_id, req["meta_fields"])
 
     if "name" in req and req["name"] != doc.name:
+        if len(req["name"].encode("utf-8")) >= 128:
+            return get_result(
+                message="The name should be less than 128 bytes.",
+                code=settings.RetCode.ARGUMENT_ERROR,
+            )
         if (
                 pathlib.Path(req["name"].lower()).suffix
                 != pathlib.Path(doc.name.lower()).suffix
diff --git a/sdk/python/test/test_http_api/test_file_management_within_dataset/test_upload_documents.py b/sdk/python/test/test_http_api/test_file_management_within_dataset/test_upload_documents.py
index 2f55532ae..b6e7b7271 100644
--- a/sdk/python/test/test_http_api/test_file_management_within_dataset/test_upload_documents.py
+++ b/sdk/python/test/test_http_api/test_file_management_within_dataset/test_upload_documents.py
@@ -139,10 +139,9 @@ class TestUploadDocuments:
         # filename_length = 129
         fp = create_txt_file(tmp_path / f"{'a' * (DOCUMENT_NAME_LIMIT - 3)}.txt")
         res = upload_documnets(get_http_api_auth, ids[0], [fp])
-        assert res["code"] == 500
+        assert res["code"] == 101
         assert (
-            res["message"]
-            == f"{'a' * (DOCUMENT_NAME_LIMIT - 3)}.txt: Exceed the maximum length of file name!"
+            res["message"].find("128") >= 0
         )
 
     def test_invalid_dataset_id(self, get_http_api_auth, tmp_path):