diff --git a/application/api/model/UserWallet.php b/application/api/model/UserWallet.php
index 227c54df..4a0d1720 100644
--- a/application/api/model/UserWallet.php
+++ b/application/api/model/UserWallet.php
@@ -140,7 +140,7 @@ class UserWallet extends Model
                 'from_id'   => $give_gift_id,
             ];
             $re = db::name('vs_user_money_log')->insertAll($account_log);
-            $re1 = db::name('user_wallet')->where('user_id',$uid)->setDec('earnings',$earnings_num);
+            $re1 = db::name('user_wallet')->where(['user_id' => $uid,'earnings' => ['>=', $earnings_num]])->setDec('earnings',$earnings_num);
             $re2 = db::name('user_wallet')->where('user_id',$uid)->setInc('coin',$earnings_num * $ear_exchange_coin);
             if($re && $re1 && $re2){
                 db::commit();