diff --git a/application/api/controller/UserWallet.php b/application/api/controller/UserWallet.php
index 2f4e1976..1c0edae6 100644
--- a/application/api/controller/UserWallet.php
+++ b/application/api/controller/UserWallet.php
@@ -57,6 +57,8 @@ class UserWallet extends BaseCom
     //收益（钻石）兑换金币
     public function exchange_coin()
     {
+        $key_name = 'exchange_coin_' . $this->uid;
+        redis_lock_exit($key_name);
         $earnings_num = input('earnings_num', 0);
         //最少兑换钻石
         $min_earnings_num = get_system_config_value('min_earnings_num');
@@ -64,6 +66,7 @@ class UserWallet extends BaseCom
             return V(0, '兑换金额不能小于' . $min_earnings_num);
         }
         $reslut = model('UserWallet')->exchange_coin($this->uid,$earnings_num);
+        redis_unlock($key_name);
         return V($reslut['code'], $reslut['msg'], $reslut['data']);
     }