diff --git a/application/api/model/RoomPit.php b/application/api/model/RoomPit.php
index c3a9f35..39885b3 100644
--- a/application/api/model/RoomPit.php
+++ b/application/api/model/RoomPit.php
@@ -245,8 +245,9 @@ class RoomPit extends Model
 //                if($dow['code'] != 1){
 //                    return ['code' => 0, 'msg' => '操作失败', 'data' => null];
 //                }
+                $exchange1 = db::name('vs_room_pit')->where(['room_id' => $room_id, 'pit_number' => $pit_infos['pit_number']])->update([ 'user_id' => 0]);
                 $exchange = db::name('vs_room_pit')->where(['room_id' => $room_id, 'pit_number' => $pit_number])->update([ 'user_id' => $user_id]);
-                if(!$exchange){
+                if(!$exchange || !$exchange1){
                     return ['code' => 0, 'msg' => '换麦失败', 'data' => null];
                 }
                 $FromUserInfo = db::name('user')->where('id',$user_id)->field('id as user_id,nickname,avatar,sex')->find();