diff --git a/application/api/model/Friend.php b/application/api/model/Friend.php
index 33ccc35..686741e 100644
--- a/application/api/model/Friend.php
+++ b/application/api/model/Friend.php
@@ -708,7 +708,7 @@ class Friend extends Model
         $result = array_diff_assoc($pit_user, $new_pit_u);//第一个数组中存在但其他数组中不存在的键/值对
         $result2 = array_diff_assoc($new_pit_u, $pit_user);
         if(!empty($result) || !empty($result2)){//换麦
-            db::name('vs_room_pit')->where(['room_id' => $room_id])->update(['user_id' => 0]);
+            db::name('vs_room_pit')->where(['room_id' => $room_id,'pit_number' => ['<',7]])->update(['user_id' => 0]);
             //新麦位上的用户
             foreach ($new_pit_u as $key_result2 => $value_result2){
                 db::name('vs_room_pit')->where(['room_id' => $room_id, 'pit_number' => $key_result2])->update(['user_id' => $value_result2]);
@@ -716,7 +716,8 @@ class Friend extends Model
             if($result){//原有麦位上的用户，且不在新麦位上的用户
                 foreach ($result as $key_result => $value_result){
                     $pit_null = model('api/RoomPit')->getRoomNullPitWithout($room_id, [7,8,9,10]);
-                    if($pit_null){
+                    $onPitUser = db::name('vs_room_pit')->where(['room_id' => $room_id, 'user_id' => $value_result])->find();
+                    if($pit_null && !$onPitUser){
                         db::name('vs_room_pit')->where(['room_id' => $room_id, 'pit_number' => $pit_null])->update(['user_id' => $value_result]);
                     }else{
                         db::name('vs_room_pit')->where(['room_id' => $room_id, 'pit_number' => $key_result])->update(['user_id' => 0]);