diff --git a/app/common/repositories/store/order/StoreOrderCreateRepository.php b/app/common/repositories/store/order/StoreOrderCreateRepository.php
index 1422ea2..f3ae53f 100644
--- a/app/common/repositories/store/order/StoreOrderCreateRepository.php
+++ b/app/common/repositories/store/order/StoreOrderCreateRepository.php
@@ -837,7 +837,7 @@ class StoreOrderCreateRepository extends StoreOrderRepository{
                     $maxNum = $systemConfig['random_reduction_max'] ?? 5;
                     // 判断：如果最大立减金额 大于剩余支付金额；则最大立减金额=剩余支付金额，否则不变
                     $maxNum = $maxNum > $cart['true_price'] ? $cart['true_price'] : $maxNum;
-                    $randomReduction = getRandom($minNum, $maxNum);
+                    $randomReduction = getRandom((float)$minNum, (float)$maxNum);
 
                     $cart['random_reduction'] = $randomReduction;
                     $cart['true_price'] = bcsub($cart['true_price'],$randomReduction,2);;