diff --git a/backend/app/api/routers/app.py b/backend/app/api/routers/app.py
index bca5fd5..1bd7e9a 100644
--- a/backend/app/api/routers/app.py
+++ b/backend/app/api/routers/app.py
@@ -26,199 +26,144 @@ api_router = r = APIRouter()
 v1_router = v = APIRouter()
 
 class ChatCallbackEvent(BaseModel):
-    event_type: CBEventType
+    event_type: ChatEventType
     payload: Optional[Dict[str, Any]] = None
-    event_id: str = ""
 
-    def get_retrieval_message(self) -> dict | None:
-        if self.payload:
-            nodes = self.payload.get("nodes")
-            if nodes:
-                msg = f"根据查询检索到 {len(nodes)} 源文件"
-            else:
-                msg = f"查询检索中: '{self.payload.get('query_str')}'"
-            return {
-                "type": "events",
-                "data": {"title": msg},
-            }
-        else:
-            return None
+    def get_common_param(self)-> dict:
+        return {
+            'event': self.event_type.name,
+            'conversation_id':self.payload.get("conversation_id"),
+            'message_id': self.payload.get("message_id"), 
+            'created_at':  int(time.time()),
+            'task_id': self.payload.get("task_id")
+        }
 
-    def get_tool_message(self) -> dict | None:
-        func_call_args = self.payload.get("function_call")
-        if func_call_args is not None and "tool" in self.payload:
-            tool = self.payload.get("tool")
-            return {
-                "type": "events",
-                "data": {
-                    "title": f"调用工具 {tool.name} ，参数: {func_call_args}",
+    def get_WorkflowStart_param(self) -> dict:
+        params = self.get_common_param()
+        params.update({
+            'workflow_run_id':self.payload.get('workflow_run_id'),
+            'data':{
+                "id": self.payload.get('workflow_run_id'),
+                "workflow_id": self.payload.get('workflow_id'),
+                "sequence_number": 1709,
+                "inputs": {
+                    "sys.query": self.payload.get('query'),
+                    "sys.files": [],
+                    "sys.conversation_id": self.payload.get('conversation_id'),
+                    "sys.user_id": self.payload.get('use_id')
                 },
+                "created_at": int(time.time())
             }
+        })
+        return params
 
-    def _is_output_serializable(self, output: Any) -> bool:
-        try:
-            json.dumps(output)
-            return True
-        except TypeError:
-            return False
+    def get_WorkflowFinished_param(self) -> dict:
+        params = self.get_common_param()
+        params.update({
+            'workflow_run_id':self.payload.get('workflow_run_id'),
+            'data':{
+                "id": self.payload.get('workflow_run_id'),
+                "workflow_id": self.payload.get('workflow_id'),
+                "sequence_number": 1709,
+                "status": "succeeded",
+                "outputs": {
+                    "answer": self.payload.get('response')
+                },
+                "error": '',
+                "elapsed_time": 36.03764106379822,
+                "total_tokens": 11707,
+                "total_steps": 10,
+                "created_by": {
+                "id": str(uuid.uuid4()),
+                "user": self.payload.get('use_id')
+                },
+                "created_at": int(time.time()),
+                "finished_at": int(time.time()),
+                "files": []
+            }
+        })
+        return params
+    
+    def get_NodeStart_param(self) -> dict:
+        params = self.get_common_param()
+        params.update({
+            'workflow_run_id':self.payload.get('workflow_run_id'),
+            'data':{
+                "id": self.payload.get('nodeid'),
+                "node_id": self.payload.get('nodeid'),
+                "node_type": "http-request",
+                "title": self.payload.get('title'),
+                "index": self.payload.get('index'),
+                "predecessor_node_id": self.payload.get('predecessor_node_id'),
+                "inputs": '',
+                "created_at": 1724398751,
+                "extras": {}
+            }
+        })
+        return params     
 
-    def get_agent_tool_response(self) -> dict | None:
-        response = self.payload.get("response")
-        if response is not None:
-            sources = response.sources
-            for source in sources:
-                # Return the tool response here to include the toolCall information
-                if isinstance(source, ToolOutput):
-                    if self._is_output_serializable(source.raw_output):
-                        output = source.raw_output
-                    else:
-                        output = source.content
+    def get_NodeFinished_param(self) -> dict:
+        params = self.get_common_param()
+        params.update({
+            'workflow_run_id':self.payload.get('workflow_run_id'),
+            'data':{
+                "id": self.payload.get('nodeid'),
+                "node_id": self.payload.get('nodeid'),
+                "node_type": "http-request",
+                "title": self.payload.get('title'),
+                "index": self.payload.get('index'),
+                "predecessor_node_id": self.payload.get('predecessor_node_id'),
+                "inputs": '',
+                "process_data": '',
+                "outputs": '',
+                "status": "succeeded",
+                "error": '',
+                "elapsed_time": 0.10402441816404462,
+                "execution_metadata": '',
+                "created_at": 1724398751,
+                "finished_at": 1724398751,
+                "files": []
+            }
+        })
+        return params  
 
-                    return {
-                        "type": "tools",
-                        "data": {
-                            "toolOutput": {
-                                "output": output,
-                                "isError": source.is_error,
-                            },
-                            "toolCall": {
-                                "id": None,  # There is no tool id in the ToolOutput
-                                "name": source.tool_name,
-                                "input": source.raw_input,
-                            },
-                        },
-                    }
+    def get_Message_param(self) -> dict:
+        params = self.get_common_param()
+        params.update({
+            'id':self.payload.get('message_id'),
+            'answer':self.payload.get('answer')
+        })
+        return params 
+    
+    def get_MessageEnd_param(self) -> dict:
+        params = self.get_common_param()
+        params.update({
+            'id':self.payload.get('message_id'),
+            'metadata':self.payload.get('metadata')
+        })
+        return params 
 
-    def to_response(self):
+    def to_response(self)-> dict|None:
         try:
             match self.event_type:
-                case "retrieve":
-                    return self.get_retrieval_message()
-                case "function_call":
-                    return self.get_tool_message()
-                case "agent_step":
-                    return self.get_agent_tool_response()
+                case "workflow_started":
+                    return self.get_WorkflowStart_param()
+                case "workflow_finished":
+                    return self.get_WorkflowFinished_param()
+                case "node_started":
+                    return self.get_NodeStart_param()
+                case 'node_finished':
+                    return self.get_NodeFinished_param()
+                case 'message':
+                    return self.get_Message_param()
+                case 'message_end':
+                    return self.get_MessageEnd_param()
                 case _:
                     return None
         except Exception as e:
             logger.error(f"转换回应时间时发生错误，原因: {e}")
             return None
 
-class DifyChatResponseEvent(BaseModel):
-    event: str
-    conversation_id: str 
-    message_id: str 
-    created_at: int = int(time.time())
-    task_id: str 
-
-    def to_response(self):
-        return self.dict()
-
-class Workflow_started_DifyChatResponseEvent(DifyChatResponseEvent):
-    event: str = 'workflow_started'
-    workflow_run_id:str 
-    data:Dict[str,Any]
-    def __init__(self,**args):
-        args['data'] = {
-            "id": args['workflow_run_id'],
-            "workflow_id": args['workflow_id'],
-            "sequence_number": 1709,
-            "inputs": {
-                "sys.query": args['query'],
-                "sys.files": [],
-                "sys.conversation_id":  args['conversation_id'],
-                "sys.user_id": args['use_id']
-            },
-            "created_at": int(time.time())
-        }
-        super().__init__(**args)
-   
-class Workflow_finished_DifyChatResponseEvent(DifyChatResponseEvent):
-    event: str = 'workflow_finished'
-    workflow_run_id:str 
-    data:Dict[str,Any]
-    def __init__(self,**args):
-        args['data'] =  {
-		    "id": args['workflow_run_id'],
-		    "workflow_id": args['workflow_id'],
-		    "sequence_number": 1709,
-		    "status": "succeeded",
-		    "outputs": {
-			    "answer": args['response']
-		    },
-		    "error": '',
-		    "elapsed_time": 36.03764106379822,
-		    "total_tokens": 11707,
-		    "total_steps": 10,
-		    "created_by": {
-			"id": str(uuid.uuid4()),
-			"user": args['use_id']
-		    },
-		    "created_at": int(time.time()),
-		    "finished_at": int(time.time()),
-		    "files": []
-        }
-        super().__init__(**args)
-
-class Message_DifyChatResponseEvent(DifyChatResponseEvent):
-    event: str = 'message'
-    id:str 
-    answer:str
-    def __init__(self,**args):
-        args['id'] = args['message_id']
-        super().__init__(**args)
-
-class MessageEnd_DifyChatResponseEvent(DifyChatResponseEvent):
-    event: str = 'message_end'
-    id:str
-    metadata:Dict[str,Any] = {}
-    def __init__(self,**args):
-        args['id'] = args['message_id']
-        super().__init__(**args)
-
-class Node_started_DifyChatResponseEvent(DifyChatResponseEvent):
-    event: str = 'node_started'
-    workflow_run_id:str
-    data:Dict[str,Any]
-    def __init__(self,**args):
-        args['data'] = {
-            "id": args['nodeid'],
-            "node_id": args['nodeid'],
-            "node_type": "http-request",
-            "title": args['title'],
-            "index": args['index'],
-            "predecessor_node_id": args['predecessor_node_id'],
-            "inputs": '',
-            "created_at": 1724398751,
-            "extras": {}
-        }
-        super().__init__(**args)
-
-class Node_finished_DifyChatResponseEvent(DifyChatResponseEvent):
-    event: str = 'node_finished'
-    workflow_run_id:str
-    data:Dict[str,Any]
-    def __init__(self,**args):
-        args['data'] = {
-            "id": args['nodeid'],
-            "node_id": args['nodeid'],
-            "node_type": "http-request",
-            "title": args['title'],
-            "index": args['index'],
-            "predecessor_node_id": args['predecessor_node_id'],
-            "inputs": '',
-            "process_data": '',
-            "outputs": '',
-            "status": "succeeded",
-            "error": '',
-            "elapsed_time": 0.10402441816404462,
-            "execution_metadata": '',
-            "created_at": 1724398751,
-            "finished_at": 1724398751,
-            "files": []
-        }
-        super().__init__(**args)
-
 class ChatEventCallbackHandler(BaseCallbackHandler):
     _aqueue: asyncio.Queue
     is_done: bool = False
@@ -239,9 +184,8 @@ class ChatEventCallbackHandler(BaseCallbackHandler):
         self._nodeStack:deque = deque()
 
         #添加工作流开始事件     
-        ids:Dict[str,Any] = self._params['ids']
         data:ChatRequestData = self._params['data']
-        args = ids
+        args:Dict[str,Any] = self._params['ids']
         args.update(
             {
                 'use_id': data.user,
@@ -249,7 +193,7 @@ class ChatEventCallbackHandler(BaseCallbackHandler):
                 'conversation_id': data.conversation_id  
             }
         )
-        wf_event = Workflow_started_DifyChatResponseEvent(**args)
+        wf_event = ChatCallbackEvent(event_type = ChatEventType.WORKFLOW_START,payload = args)
         if wf_event.to_response() is not None:
             self._aqueue.put_nowait(wf_event)
 
@@ -264,9 +208,7 @@ class ChatEventCallbackHandler(BaseCallbackHandler):
 
         self._nodeStack.append(event_id)      
         nindex = self._nodeStack.count() - 1
-
-        ids:Dict[str,Any] = self._params['ids']
-        args = ids
+        args:Dict[str,Any] = self._params['ids']
         args.update(
             {
                 'nodeid':event_id,
@@ -275,7 +217,7 @@ class ChatEventCallbackHandler(BaseCallbackHandler):
                 'predecessor_node_id': self._nodeStack[nindex - 1] if nindex > 0 else ''
             }
         )
-        nd_event = Node_started_DifyChatResponseEvent(**args)
+        nd_event = ChatCallbackEvent(event_type = ChatEventType.NODE_START,payload = args)
         if nd_event.to_response() is not None:
             self._aqueue.put_nowait(nd_event)
 
@@ -302,7 +244,7 @@ class ChatEventCallbackHandler(BaseCallbackHandler):
                     'predecessor_node_id':self._nodeStack[nindex - 1] if nindex > 0 else ''
                 }
             )
-            nd_event = Node_finished_DifyChatResponseEvent(**args)
+            nd_event = ChatCallbackEvent(event_type = ChatEventType.NODE_FINISHED,payload = args)
             if nd_event.to_response() is not None:
                 self._aqueue.put_nowait(nd_event)
             self._nodeStack.pop()
@@ -319,22 +261,21 @@ class ChatEventCallbackHandler(BaseCallbackHandler):
     ) -> None:
         """No-op."""
         logger.info("trace_end:{} trace_map:{}\n".format(trace_id, trace_map))
-        ids:Dict[str,Any] = self._params['ids']
         data:ChatRequestData = self._params['data']    
-        args = ids
+        args:Dict[str,Any] = self._params['ids']
         args.update(
             {
                 'response':self._response,
                 'conversation_id': data.conversation_id
             }
         )
-        wf_event = Workflow_finished_DifyChatResponseEvent(**args)
+        wf_event = ChatCallbackEvent(event_type = ChatEventType.WORKFLOW_FINISHED,payload = args)
         if wf_event.to_response() is not None:
             self._aqueue.put_nowait(wf_event)
 
         
-        args = ids
-        msgEnt_event = MessageEnd_DifyChatResponseEvent(**args)
+        args:Dict[str,Any] = self._params['ids']
+        msgEnt_event = ChatCallbackEvent(event_type = ChatEventType.MESSAGE_END,payload = args)
         if msgEnt_event.to_response() is not None:
             self._aqueue.put_nowait(msgEnt_event)                 
 
@@ -367,8 +308,8 @@ class ChatStreamResponse(StreamingResponse):
             'answer':token,
             'conversation_id':cls.data.conversation_id
         })
-        event = Message_DifyChatResponseEvent(**params)
-        data_str = json.dumps(event.dict())
+        event = ChatCallbackEvent(event_type = ChatEventType.MESSAGE,payload = params)
+        data_str = json.dumps(event.to_response())
         return f"{cls.DATA_PREFIX}{data_str}\n\n"
 
     @classmethod
diff --git a/backend/app/api/routers/request/baseConfig.py b/backend/app/api/routers/request/baseConfig.py
index eb8515a..d254d8a 100644
--- a/backend/app/api/routers/request/baseConfig.py
+++ b/backend/app/api/routers/request/baseConfig.py
@@ -1,5 +1,7 @@
 from pydantic import BaseModel
 import os
+from enum import Enum
+
 class BaseConfig(BaseModel):
 	projectInfo:str = os.getenv("PROJECT_TITLE","您好，我是博微工程理解小助手，您可以问我有关[线路工程]工程数据的相关问题！")
 
@@ -69,3 +71,10 @@ class BaseConfig(BaseModel):
 		}
 
 
+class ChatEventType(str, Enum):
+    WORKFLOW_START = "workflow_started"
+    WORKFLOW_FINISHED = "workflow_finished"
+    NODE_START = "node_started"
+    NODE_FINISHED = "node_finished"
+    MESSAGE = "message"
+    MESSAGE_END = "message_end"
\ No newline at end of file