diff --git a/app/chat/controller/MessageController.php b/app/chat/controller/MessageController.php
index 22899e1..977d0c5 100644
--- a/app/chat/controller/MessageController.php
+++ b/app/chat/controller/MessageController.php
@@ -200,11 +200,19 @@ class MessageController extends ApiController
             $lastMsg = '';
             $unreadCount = 0;
             if(!empty($session['session_id'])) {
-                // 最后一条消息
-                $lastMsg = Db::name('chat_message')
-                    ->where('session_id', $session['session_id'])
-                    ->order('send_time', 'desc')
-                    ->find();
+                if($session['chat_type'] == 2) {
+                    // 最后一条消息
+                    $lastMsg = Db::name('chat_message')
+                        ->where('group_id', $session['group_id'])
+                        ->order('send_time', 'desc')
+                        ->find();
+                }else {
+                    $lastMsg = Db::name('chat_message')
+                        ->where('session_id', $session['session_id'])
+                        ->order('send_time', 'desc')
+                        ->find();
+                }
+
                 // 未读计数
                 $unreadCount = Db::name('chat_unread_count')->where(['user_id' => $this->uid, 'session_id' => $session['session_id']])->value('count')?:0;
             }