diff --git a/src/renderer/src/pages/home/Inputbar/Inputbar.tsx b/src/renderer/src/pages/home/Inputbar/Inputbar.tsx
index d97a0164e1..84dfc5db2c 100644
--- a/src/renderer/src/pages/home/Inputbar/Inputbar.tsx
+++ b/src/renderer/src/pages/home/Inputbar/Inputbar.tsx
@@ -241,16 +241,12 @@ const Inputbar: FC<Props> = ({ assistant: _assistant, setActiveTopic, topic }) =
         baseUserMessage.mentions = mentionedModels
       }
 
-      const assistantWithTopicPrompt = topic.prompt
-        ? { ...assistant, prompt: `${assistant.prompt}\n${topic.prompt}` }
-        : assistant
-
       baseUserMessage.usage = await estimateUserPromptUsage(baseUserMessage)
 
       const { message, blocks } = getUserMessage(baseUserMessage)
       message.traceId = parent?.spanContext().traceId
 
-      dispatch(_sendMessage(message, blocks, assistantWithTopicPrompt, topic.id))
+      dispatch(_sendMessage(message, blocks, assistant, topic.id))
 
       // Clear input
       setText('')
diff --git a/src/renderer/src/pages/home/Messages/Message.tsx b/src/renderer/src/pages/home/Messages/Message.tsx
index 4f7c1fd1c5..12a1079b3d 100644
--- a/src/renderer/src/pages/home/Messages/Message.tsx
+++ b/src/renderer/src/pages/home/Messages/Message.tsx
@@ -100,11 +100,8 @@ const MessageItem: FC<Props> = ({
 
   const handleEditResend = useCallback(
     async (blocks: MessageBlock[]) => {
-      const assistantWithTopicPrompt = topic.prompt
-        ? { ...assistant, prompt: `${assistant.prompt}\n${topic.prompt}` }
-        : assistant
       try {
-        await resendUserMessageWithEdit(message, blocks, assistantWithTopicPrompt)
+        await resendUserMessageWithEdit(message, blocks, assistant)
         stopEditing()
       } catch (error) {
         logger.error('Failed to resend message:', error as Error)
diff --git a/src/renderer/src/pages/home/Messages/MessageMenubar.tsx b/src/renderer/src/pages/home/Messages/MessageMenubar.tsx
index 4d99319132..0c048c4c44 100644
--- a/src/renderer/src/pages/home/Messages/MessageMenubar.tsx
+++ b/src/renderer/src/pages/home/Messages/MessageMenubar.tsx
@@ -150,10 +150,7 @@ const MessageMenubar: FC<Props> = (props) => {
   const handleResendUserMessage = useCallback(
     async (messageUpdate?: Message) => {
       if (!loading) {
-        const assistantWithTopicPrompt = topic.prompt
-          ? { ...assistant, prompt: `${assistant.prompt}\n${topic.prompt}` }
-          : assistant
-        await resendMessage(messageUpdate ?? message, assistantWithTopicPrompt)
+        await resendMessage(messageUpdate ?? message, assistant)
       }
     },
     [assistant, loading, message, resendMessage, topic.prompt]
@@ -379,12 +376,8 @@ const MessageMenubar: FC<Props> = (props) => {
     // const _message = resetAssistantMessage(message, selectedModel)
     // editMessage(message.id, { ..._message }) // REMOVED
 
-    const assistantWithTopicPrompt = topic.prompt
-      ? { ...assistant, prompt: `${assistant.prompt}\n${topic.prompt}` }
-      : assistant
-
     // Call the function from the hook
-    regenerateAssistantMessage(message, assistantWithTopicPrompt)
+    regenerateAssistantMessage(message, assistant)
   }
 
   // 按条件筛选能够提及的模型，该函数仅在isAssistantMessage时会用到
diff --git a/src/renderer/src/store/thunk/messageThunk.ts b/src/renderer/src/store/thunk/messageThunk.ts
index c8284eb31f..039fdfd648 100644
--- a/src/renderer/src/store/thunk/messageThunk.ts
+++ b/src/renderer/src/store/thunk/messageThunk.ts
@@ -288,14 +288,18 @@ const dispatchMultiModelResponses = async (
 }
 
 // --- End Helper Function ---
-
+// 发送和处理助手响应的实现函数，话题提示词在此拼接
 const fetchAndProcessAssistantResponseImpl = async (
   dispatch: AppDispatch,
   getState: () => RootState,
   topicId: string,
-  assistant: Assistant,
+  origAssistant: Assistant,
   assistantMessage: Message // Pass the prepared assistant message (new or reset)
 ) => {
+  const topic = origAssistant.topics.find((t) => t.id === topicId)
+  const assistant = topic?.prompt
+    ? { ...origAssistant, prompt: `${origAssistant.prompt}\n${topic.prompt}` }
+    : origAssistant
   const assistantMsgId = assistantMessage.id
   let callbacks: StreamProcessorCallbacks = {}
   try {