diff --git a/app/Services/UserCouponService.php b/app/Services/UserCouponService.php
index 9a74aea..754de13 100644
--- a/app/Services/UserCouponService.php
+++ b/app/Services/UserCouponService.php
@@ -84,11 +84,11 @@ class UserCouponService extends BaseService
     /**
      * 获取可用优惠卷总金额
      * @param array $coupons 优惠卷数据
-     * @return int
+     * @return string
      */
-    public function getCouponTotalPrice(array $coupons): int
+    public function getCouponTotalPrice(array $coupons): string
     {
-        $coupon_total_price = 0;
+        $coupon_total_price = "0";
 
         foreach ($coupons as $coupon){
             $coupon_total_price = bcadd($coupon_total_price,$coupon['coupon_price'],2);