diff --git a/app/common.php b/app/common.php
index 27f14a63..ba98d7f0 100644
--- a/app/common.php
+++ b/app/common.php
@@ -1190,5 +1190,20 @@ if (!function_exists('strUcwords')) {
     }
 }
 
-
+if (!function_exists('reset_index')) {
+    /**
+     * 重置数组索引
+     * @param array $data
+     * @param string $index
+     * @return array
+     */
+    function reset_index(array $data, string $index)
+    {
+        $return = [];
+        foreach ($data as $item) {
+            $return[$item[$index]] = $item;
+        }
+        return $return;
+    }
+}
 
diff --git a/app/common/dao/store/coupon/StoreCouponUserDao.php b/app/common/dao/store/coupon/StoreCouponUserDao.php
index 5ba52997..deaa0ea2 100644
--- a/app/common/dao/store/coupon/StoreCouponUserDao.php
+++ b/app/common/dao/store/coupon/StoreCouponUserDao.php
@@ -17,6 +17,8 @@ namespace app\common\dao\store\coupon;
 use app\common\dao\BaseDao;
 use app\common\model\BaseModel;
 use app\common\model\store\coupon\StoreCouponUser;
+use app\common\repositories\store\coupon\StoreCouponRepository;
+use think\exception\ValidateException;
 
 /**
  * Class StoreCouponUserDao
@@ -27,6 +29,30 @@ use app\common\model\store\coupon\StoreCouponUser;
 class StoreCouponUserDao extends BaseDao
 {
 
+    /** @var float $maxAmount 单笔订单计算红包的最大有效金额 */
+    public $maxAmount = 20000;
+
+    /** @var float $orderTotalPrice 订单总金额 */
+    public $orderTotalPrice;
+
+    /** @var float $orderProductPrice 当前商品金额 */
+    public $orderProductPrice;
+
+    /** @var float $isLast 是否最后一条数据 */
+    public $isLast = false;
+
+    /** @var float $groupOrderTotalPrice 订单组总金额 */
+    public $groupOrderTotalPrice;
+
+    /** @var float $couponTotalAmount 红包总金额 */
+    public $couponTotalAmount;
+    /** @var int $orderType 订单类型：1 groupOrder，2 order */
+    public $orderType = 2;
+    /** @var float $couponUsed 已使用的红包金额 */
+    public $couponUsed;
+    /** @var float $profitRate 商品毛利率 */
+    public $profitRate;
+
     /**
      * @return BaseModel
      * @author xaboy
@@ -129,4 +155,115 @@ class StoreCouponUserDao extends BaseDao
         $this->getModel()::getDB()->where($field, $id)->delete();
     }
 
+    /**
+     * 增加优惠券余额
+     * @param $id
+     * @param $amount
+     * @throws \think\db\exception\DataNotFoundException
+     * @throws \think\db\exception\DbException
+     * @throws \think\db\exception\ModelNotFoundException
+     */
+    public function increase($id, $amount)
+    {
+        $storeCouponUser = StoreCouponUser::where('coupon_user_id', $id)->find();
+        if (empty($storeCouponUser)) {
+            throw new ValidateException('优惠券不存在');
+        }
+        $storeCouponUser->coupon_price = bcadd($storeCouponUser->coupon_price, $amount, 2);
+        if (!$storeCouponUser->save()) {
+            throw new ValidateException('优惠券余额更新出错');
+        }
+    }
+
+    /**
+     * 扣减优惠券余额
+     * @param $id
+     * @param $amount
+     * @throws \think\db\exception\DataNotFoundException
+     * @throws \think\db\exception\DbException
+     * @throws \think\db\exception\ModelNotFoundException
+     */
+    public function reduce($id, $amount)
+    {
+        $storeCouponUser = StoreCouponUser::where('coupon_user_id', $id)->find();
+        if (empty($storeCouponUser)) {
+            throw new ValidateException('优惠券不存在');
+        }
+        $isBalance = $storeCouponUser->isbalance();
+        $couponPrice = bcsub($storeCouponUser->coupon_price, $amount, 2);
+        if ($isBalance && $couponPrice > 0) {
+            $storeCouponUser->coupon_price = $couponPrice;
+        }
+        if ($couponPrice <= 0 || !$isBalance) {
+            $storeCouponUser->status = 1;
+        }
+        if (!$storeCouponUser->save()) {
+            throw new ValidateException('优惠券余额更新出错');
+        }
+    }
+
+    /**
+     * 按商品使用优惠券
+     * @param $type
+     * @return array
+     */
+    public function couponByProduct($type = StoreCouponRepository::TYPE_STORE_COUPON)
+    {
+        // 把所有金额转换成分，避免红包金额产生误差
+        $totalPrice = $this->orderProductPrice * 100;
+        $couponUsed = $this->couponUsed * 100;
+        $couponTotal = $this->couponTotalAmount * 100;
+        if ($type == StoreCouponRepository::TYPE_STORE_COUPON) {
+            //店铺现金抵扣券,根据商品毛利率计算优惠金额
+            $couponBalance = $couponTotal - $couponUsed;
+            if ($couponBalance <= 0) {
+                return [$this->orderProductPrice, '0.00', $this->couponUsed];
+            }
+            $rate = $this->getRate($this->profitRate);
+            $useAmount = bcmul($totalPrice, $rate, 2);
+            if ($useAmount >= $couponBalance) {
+                $useAmount = $couponBalance;
+            }
+        } else {
+            //平台购物卡
+            $groupOrderTotalPrice = $this->groupOrderTotalPrice * 100;
+            $rate = bcdiv($totalPrice, $groupOrderTotalPrice, 5);
+            if ($couponTotal >= $groupOrderTotalPrice) {
+                $useAmount = $totalPrice;
+            } else {
+                $useAmount = $this->isLast ? $couponTotal - $couponUsed : round(bcmul($couponTotal, $rate, 1));
+            }
+        }
+        $payPrice = $totalPrice - $useAmount;
+        $couponUsed += $useAmount;
+        $payPrice = bcdiv($payPrice, 100, 2);
+        $useAmount = bcdiv($useAmount, 100, 2);
+        $couponUsed = bcdiv($couponUsed, 100, 2);
+        /** $payPrice：实际支付的金额，$useAmount：当前商品使用的优惠券金额，$couponUsed：使用的优惠券金额总计 */
+        return [$payPrice, $useAmount, $couponUsed];
+    }
+
+    /**
+     * 根据商品毛利率计算红包抵扣比例
+     * @param float $profitRate 毛利率
+     * @return float|int
+     */
+    public function getRate($profitRate)
+    {
+        $rateArray = [
+            '0.25' => 0.4,
+            '0.2' => 0.3,
+            '0.15' => 0.2,
+            '0.1' => 0.1,
+        ];
+        $rate = 0;
+        foreach ($rateArray as $k => $item) {
+            if ($profitRate >= $k) {
+                $rate = $item;
+                break;
+            }
+        }
+        return $rate;
+    }
+
 }
diff --git a/app/common/model/store/coupon/StoreCouponUser.php b/app/common/model/store/coupon/StoreCouponUser.php
index 7ffdae1d..4d2b6ebe 100644
--- a/app/common/model/store/coupon/StoreCouponUser.php
+++ b/app/common/model/store/coupon/StoreCouponUser.php
@@ -17,6 +17,7 @@ namespace app\common\model\store\coupon;
 use app\common\model\BaseModel;
 use app\common\model\system\merchant\Merchant;
 use app\common\model\user\User;
+use app\common\repositories\store\coupon\StoreCouponRepository;
 
 /**
  * Class StoreCouponUser
@@ -66,4 +67,14 @@ class StoreCouponUser extends BaseModel
     {
         return $this->hasOne(Merchant::class, 'mer_id', 'mer_id');
     }
+
+    /**
+     * 当前优惠券是否有余额
+     * @return bool
+     */
+    public function isBalance()
+    {
+        return in_array($this->coupon_type, [StoreCouponRepository::TYPE_STORE_COUPON, StoreCouponRepository::TYPE_PLATFORM_CARD]);
+    }
+
 }
diff --git a/app/common/repositories/store/coupon/StoreCouponRepository.php b/app/common/repositories/store/coupon/StoreCouponRepository.php
index a4e7d6ce..a08532c3 100644
--- a/app/common/repositories/store/coupon/StoreCouponRepository.php
+++ b/app/common/repositories/store/coupon/StoreCouponRepository.php
@@ -48,7 +48,7 @@ class StoreCouponRepository extends BaseRepository
     const TYPE_STORE_ALL = 0;
     //店铺商品券
     const TYPE_STORE_PRODUCT = 1;
-    //店铺现金抵扣券
+    //店铺现金抵扣券，可结余
     const TYPE_STORE_COUPON = 2;
     //平台券
     const TYPE_PLATFORM_ALL = 10;
@@ -334,8 +334,9 @@ class StoreCouponRepository extends BaseRepository
         $data = [
             'uid' => $uid,
             'coupon_title' => $coupon['title'],
+            'coupon_type' => $coupon['type'],
             'coupon_price' => $coupon['coupon_price'],
-            'balance' => $coupon['coupon_price'],
+            'origin_price' => $coupon['coupon_price'],
             'use_min_price' => $coupon['use_min_price'],
             'type' => $type,
             'coupon_id' => $coupon['coupon_id'],
diff --git a/app/common/repositories/store/order/StoreOrderCreateRepository.php b/app/common/repositories/store/order/StoreOrderCreateRepository.php
index 460bfdf3..c1633129 100644
--- a/app/common/repositories/store/order/StoreOrderCreateRepository.php
+++ b/app/common/repositories/store/order/StoreOrderCreateRepository.php
@@ -2,6 +2,7 @@
 
 namespace app\common\repositories\store\order;
 
+use app\common\dao\store\coupon\StoreCouponUserDao;
 use app\common\repositories\system\form\FormRepository;
 use app\common\repositories\system\RecordRepository;
 use crmeb\jobs\SendSmsJob;
@@ -1107,7 +1108,7 @@ class StoreOrderCreateRepository extends StoreOrderRepository
             'activity_type' => $orderInfo['order_type'],
         ];
         event('order.create.before', compact('groupOrder', 'orderList'));
-        $group = Db::transaction(function () use ($ex, $user, $topUid, $spreadUid, $uid, $receipt_data, $cartIds, $allUseCoupon, $groupOrder, $orderList, $orderInfo) {
+        $group = Db::transaction(function () use ($ex, $user, $topUid, $spreadUid, $uid, $receipt_data, $cartIds, $allUseCoupon, $groupOrder, $orderList, $orderInfo, $useCoupon) {
             $storeGroupOrderRepository = app()->make(StoreGroupOrderRepository::class);
             $storeCartRepository = app()->make(StoreCartRepository::class);
             $attrValueRepository = app()->make(ProductAttrValueRepository::class);
@@ -1117,6 +1118,7 @@ class StoreOrderCreateRepository extends StoreOrderRepository
             //订单记录
             $storeOrderStatusRepository = app()->make(StoreOrderStatusRepository::class);
             $userMerchantRepository = app()->make(UserMerchantRepository::class);
+            $storeCouponUserDao = new StoreCouponUserDao();
 
             //减库存
             foreach ($orderList as $order) {
@@ -1156,6 +1158,9 @@ class StoreOrderCreateRepository extends StoreOrderRepository
                         throw new ValidateException('库存不足');
                     }
                 }
+                if (!empty($useCoupon[$order['mer_id']])) {
+                    $storeCouponUserDao->reduce($useCoupon[$order['mer_id']][0], $order['total_price']);
+                }
             }
 
             if ($orderInfo['order_type'] == 10 && !app()->make(StoreDiscountRepository::class)->decStock($orderList[0]['cartInfo']['list'][0]['source_id'])) {
@@ -1167,12 +1172,9 @@ class StoreOrderCreateRepository extends StoreOrderRepository
                 'is_pay' => 1
             ]);
 
-            //使用优惠券
-            if (count($allUseCoupon)) {
-                $couponUserRepository->updates($allUseCoupon, [
-                    'use_time' => date('Y-m-d H:i:s'),
-                    'status' => 1
-                ]);
+            //使用了平台优惠券
+            if (!empty($useCoupon[0])) {
+                $storeCouponUserDao->reduce($useCoupon[0][0], $groupOrder['total_price']);
             }
 
             //创建订单