diff --git a/app/model/KnowledgeDoc.py b/app/model/KnowledgeDoc.py
index 57660b9..70a040d 100644
--- a/app/model/KnowledgeDoc.py
+++ b/app/model/KnowledgeDoc.py
@@ -71,12 +71,14 @@ async def handle_after_batch_delete(delete_cls_list, row_dict_list, session):
   await asyncio.gather(*task_list)
 
 
+# 专门给KnowledgeService使用的，用来给知识库上传文档的时候操作Mysql数据库中的doc表
 KnowledgeDocService = create_model_service(
   KnowledgeDocModel,
   after_delete=handle_after_delete,
   after_batch_delete=handle_after_batch_delete
 )
 
+# 专门给在线文档模块使用的
 KnowledgeDocServiceWithCreator = create_model_service(
   KnowledgeDocModel,
   after_delete=handle_after_delete,