diff --git a/agent/agent_config.py b/agent/agent_config.py
index d2e111e..5315abf 100644
--- a/agent/agent_config.py
+++ b/agent/agent_config.py
@@ -36,6 +36,7 @@ class AgentConfig:
     tool_response: bool = True
     preamble_text: Optional[str] = None
     messages: Optional[List] = field(default_factory=list)
+    _origin_messages: Optional[List] = field(default_factory=list)
 
     logging_handler: Optional['LoggingCallbackHandler'] = None
 
@@ -96,6 +97,7 @@ class AgentConfig:
             generate_cfg=generate_cfg,
             logging_handler=LoggingCallbackHandler(),
             messages=messages,
+            _origin_messages=messages,
             preamble_text=preamble_text,
         )
         config.safe_print()
@@ -130,6 +132,7 @@ class AgentConfig:
             generate_cfg={},  # v2接口不传递额外的generate_cfg
             logging_handler=LoggingCallbackHandler(),
             messages=messages,
+            _origin_messages=messages,
             preamble_text=preamble_text,
         )
         config.safe_print()
diff --git a/agent/guideline_middleware.py b/agent/guideline_middleware.py
index e76edea..6628d9a 100644
--- a/agent/guideline_middleware.py
+++ b/agent/guideline_middleware.py
@@ -34,6 +34,7 @@ class GuidelineMiddleware(AgentMiddleware):
         
         self.robot_type = config.robot_type
         self.terms_list = terms_list
+        self.messages = config._origin_messages
 
         if self.robot_type == "general_agent":
             if not self.guidelines:
@@ -94,7 +95,7 @@ Action: Provide concise, friendly, and personified natural responses.
         if not self.guidelines:
             return None
 
-        guideline_prompt = self.get_guideline_prompt(convert_to_openai_messages(state['messages']))
+        guideline_prompt = self.get_guideline_prompt(convert_to_openai_messages(self.messages))
 
         # 准备完整的消息列表
         messages = state['messages'].copy()
@@ -123,7 +124,7 @@ Action: Provide concise, friendly, and personified natural responses.
         if not self.guidelines:
             return None
         
-        guideline_prompt = self.get_guideline_prompt(convert_to_openai_messages(state['messages']))
+        guideline_prompt = self.get_guideline_prompt(convert_to_openai_messages(self.messages))
         
         # 准备完整的消息列表
         messages = state['messages'].copy()