diff --git a/application/common/model/UserWallet.php b/application/common/model/UserWallet.php
index 3f55a925..108781dc 100644
--- a/application/common/model/UserWallet.php
+++ b/application/common/model/UserWallet.php
@@ -252,6 +252,7 @@ class UserWallet extends Model
                 $change_type = $change_value > 0 ? self::BACKGROUND_RECHARGE_DIAMOND : self::BACKGROUND_DEDUCTION_DIAMOND;
             }
         }
+        $change_value = abs($change_value);
 
         // 验证用户信息
         $user_info = db::name('user')->find($user_id);