diff --git a/backend/app/api/routers/chat.py b/backend/app/api/routers/chat.py
index abe77eb..6476567 100644
--- a/backend/app/api/routers/chat.py
+++ b/backend/app/api/routers/chat.py
@@ -48,6 +48,8 @@ async def chat(
 ):
     try:
         last_message_content = data.get_last_message_content()
+        # 由于基于历史消息的提示词没有调整好，所以暂时屏蔽历史消息
+        data.messages.clear()
         messages = data.get_history_messages()
 
         doc_ids = data.get_chat_document_ids()
@@ -59,8 +61,6 @@ async def chat(
         event_handler = EventCallbackHandler()
         chat_engine.callback_manager.handlers.append(event_handler)  # type: ignore
 
-        # 由于基于历史消息的提示词没有调整好，所以暂时屏蔽历史消息
-        messages = None
         response = await chat_engine.astream_chat(last_message_content, messages)
         process_response_nodes(response.source_nodes, background_tasks)