diff --git a/application/api/model/Room.php b/application/api/model/Room.php
index eff8500..ce62d54 100644
--- a/application/api/model/Room.php
+++ b/application/api/model/Room.php
@@ -1302,6 +1302,7 @@ class Room extends Model
             ->join('user b', 'a.user_id = b.id')
             ->field('a.user_id,b.nickname,b.avatar')
             ->where(['a.room_id' => $room_id,'b.is_online' => 1])
+            ->group('a.user_id')
             ->order('a.id asc')
             ->page($page, $limit)
             ->select();