diff --git a/ui/packages/ai/AiCopilot.vue b/ui/packages/ai/AiCopilot.vue
index 63a9d8e1..cd59b562 100644
--- a/ui/packages/ai/AiCopilot.vue
+++ b/ui/packages/ai/AiCopilot.vue
@@ -75,9 +75,9 @@ export default {
     },
     handleSend() {
       if (!this.prompt.trim()) return this.$message.error("无法发送空白信息")
-      const concatenateStr = (content, i = 0) => {
-        this.history.at(-1).content += content.slice(i, i + 1)
-        if (++i < content.length) setTimeout(() => concatenateStr(content, i), 50)
+      const concatenateStr = (content, i = 0, target = this.history.at(-1)) => {
+        target.content += content.slice(i, i + 1)
+        if (++i < content.length) setTimeout(() => concatenateStr(content, i, target), 50)
       }
       this.$debounce(() => {
         const {currentConversation: conversationId, app, prompt: content} = this.$data