diff --git a/pages/ai/aichat.js b/pages/ai/aichat.js
index ccc7bd0..07a385b 100644
--- a/pages/ai/aichat.js
+++ b/pages/ai/aichat.js
@@ -195,21 +195,23 @@ Page({
     const user = app.globalData.user
     const socket = app.globalData.chatSocket
 
+    // 先判空再判连接状态，避免 socket 不存在时读取 isConnected 报错
+    if (!socket) {
+      this.handleAIError('网络连接失败，请检查网络设置')
+      return
+    }
+
     if (!socket.isConnected) {
       socket.connect()
     }
 
-    if (socket) {
-      socket.send({
-        type: type,
-        content: content,
-        userId: user ? user._id : '',
-        appId: app.globalData.appId
-      })
-    } else {
-      // 处理连接失败的情况
-      this.handleAIError('网络连接失败，请检查网络设置')
-    }
+    socket.send({
+      type: type,
+      content: content,
+      // 身份以 token 为准，服务端不再接受凭 userId 明文接入
+      token: (user && user.security && user.security.token) || '',
+      appId: app.globalData.appId
+    })
   },
 
   handleAIError(errorMessage) {