diff --git a/app/Services/UserCouponService.php b/app/Services/UserCouponService.php
index dfb77a0..658ee85 100644
--- a/app/Services/UserCouponService.php
+++ b/app/Services/UserCouponService.php
@@ -162,8 +162,8 @@ class UserCouponService extends BaseService
                 }
             }
 
-            // 处理满减金额优惠卷
-            if ($coupon['coupon_type'] == 2){
+            // 处理满减金额/无门槛优惠卷
+            if ($coupon['coupon_type'] == 2 || $coupon['coupon_type'] == 1){
                 // 可共用一个优惠卷的商品金额问题
                 $product_price = 0;
 
@@ -185,9 +185,20 @@ class UserCouponService extends BaseService
                     );
                 }
 
-                if ($coupon['with_amount'] > $product_price){
-                    // 此优惠卷因商品金额不足，无法使用
-                    $coupons[$key]['is_can_use'] = 0;
+                // 满减金额优惠卷
+                if ($coupon['coupon_type'] == 2){
+                    if ($coupon['with_amount'] > $product_price){
+                        // 此优惠卷因商品金额不足，无法使用
+                        $coupons[$key]['is_can_use'] = 0;
+                    }
+                }
+
+                // 无门槛优惠卷
+                if ($coupon['coupon_type'] == 1){
+                    if ($product_price <= 0){
+                        // 商品总金额已经为0，不使用优惠卷
+                        $coupons[$key]['is_can_use'] = 0;
+                    }
                 }
             }