diff --git a/app/controller/add_langgraph_chat_route.py b/app/controller/add_langgraph_chat_route.py
index 14ea4f1..289f910 100644
--- a/app/controller/add_langgraph_chat_route.py
+++ b/app/controller/add_langgraph_chat_route.py
@@ -32,23 +32,19 @@ class ChatParam(BaseModel):
 
 
 class ChatAgent:
-  agent: Union[CompiledStateGraph, None] = None
-
   @staticmethod
-  async def get_agent() -> CompiledStateGraph:
-    if not ChatAgent.agent:
-      ChatAgent.agent = create_react_agent(
-        model=create_llm("huoshan-think-pro"),
-        tools=tool_list,
-        checkpointer=await PostgresCheckpointerManager.get_instance(),
-        prompt="""
+  async def get_agent(system_prompt: str | None = None) -> CompiledStateGraph:
+    return create_react_agent(
+      model=create_llm("huoshan-think-pro"),
+      tools=tool_list,
+      checkpointer=await PostgresCheckpointerManager.get_instance(),
+      prompt=system_prompt or """
         - 你是一名擅长使用工具的智能助手，你需要根据用户问题来进行回答，请使用中文进行回答。
         - 当用户问题需要调用工具时再调用工具，否则按照你的知识来回答问题。
         - 你每次只能调用一个工具
         - 特别注意，特别注意，特别注意，如果工具的返回结果是一个数组，你只能回复“工具已经执行完毕”
         """
-      )
-    return ChatAgent.agent
+    )
 
   @staticmethod
   async def get_chat_state(thread_id: str):
@@ -96,7 +92,12 @@ def add_langgraph_chat_route(app: FastAPI):
 
     async def generator_function():
 
-      graph = await ChatAgent.get_agent()
+      system_prompt = stream_input.get('system_prompt', None)
+      print("system_prompt ==>> ", system_prompt)
+
+      graph = await ChatAgent.get_agent(
+        system_prompt=system_prompt
+      )
 
       # chat_state = await ChatAgent.get_chat_state(thread_id)
       # chat_history_list = chat_state.get('messages')