diff --git a/app/Services/PatientOrderService.php b/app/Services/PatientOrderService.php
index 34114c8..ca0078f 100644
--- a/app/Services/PatientOrderService.php
+++ b/app/Services/PatientOrderService.php
@@ -1212,6 +1212,10 @@ class PatientOrderService extends BaseService
             $payment_amount_total = 0.01;
         }
 
+        if ($payment_amount_total <= 0){
+            return fail(HttpEnumCode::SERVER_ERROR);
+        }
+
         // 确定支付渠道
         // 支付渠道（1:小程序支付 2:微信扫码支付）
         if ($client_type == 1) {
@@ -1580,7 +1584,10 @@ class PatientOrderService extends BaseService
         }
 
         $amount_total = 0;
-        $coupon_amount_total = 0;
+
+        // 优惠卷商品数据
+        $coupon_product_datas = array();
+
         foreach ($order_prescription_product as &$item) {
             $params = array();
             $params['product_id'] = $item['product_id'];
@@ -1600,7 +1607,25 @@ class PatientOrderService extends BaseService
                 }
             }
 
-            $amount_total += $product['product_price'] * $item['prescription_product_num'];
+            $amount_total = bcadd($amount_total,($product['product_price'] * $item['prescription_product_num']),2);
+
+            // 优惠卷商品数据
+            $coupon_product_data = array();
+            $product['product_num'] = $item['prescription_product_num'];
+            $coupon_product_data = $product->toArray();
+            $coupon_product_datas[] = $coupon_product_data;
+        }
+
+        // 定义优惠卷金额默认值
+        $coupon_amount_total = 0;
+
+        if (!empty($coupon_product_datas)) {
+            // 获取患者购药可用的优惠卷
+            $userCouponService = new UserCouponService();
+            $user_coupons = $userCouponService->getUserProductUsableCoupon($user_info['user_id'], $coupon_product_datas);
+
+            // 获取可用优惠卷总金额
+            $coupon_amount_total = $userCouponService->getCouponTotalPrice($user_coupons);
         }
 
         // 获取运费金额
@@ -1613,11 +1638,10 @@ class PatientOrderService extends BaseService
             }
         }
 
-        // 实际支付金额
+        // 实际支付金额=商品总金额-优惠卷金额+运费金额
+        $payment_amount_total = bcadd(bcsub($amount_total , $coupon_amount_total,2), $logistics_fee, 2);
         if (env("APP_ENV") == "dev") {
             $payment_amount_total = 0.01;
-        } else {
-            $payment_amount_total = $amount_total + $logistics_fee;
         }
 
         // 获取收货地址