diff --git a/app/store/model/Coupon.php b/app/store/model/Coupon.php
--- a/app/store/model/Coupon.php
+++ b/app/store/model/Coupon.php
@@ -7,6 +7,7 @@
 namespace app\store\model;
 
 use app\common\model\Coupon as CouponModel;
+use app\common\service\FixedScaleDecimalResponse;
 use app\common\enum\coupon\ExpireType as ExpireTypeEnum;
 use app\common\enum\coupon\ApplyRange as ApplyRangeEnum;
 
@@ -17,6 +18,13 @@
  */
 class Coupon extends CouponModel
 {
+    public function toArray(): array
+    {
+        return FixedScaleDecimalResponse::fields(parent::toArray(), [
+            'reduce_price', 'min_price', 'write_off_limit_amount',
+        ]);
+    }
+
     /**
      * 获取列表记录
      * @param array $param
diff --git a/app/terminal/model/Coupon.php b/app/terminal/model/Coupon.php
--- a/app/terminal/model/Coupon.php
+++ b/app/terminal/model/Coupon.php
@@ -9,6 +9,7 @@
 namespace app\terminal\model;
 
 use app\common\model\Coupon as CouponModel;
+use app\common\service\FixedScaleDecimalResponse;
 use app\common\enum\coupon\ExpireType as ExpireTypeEnum;
 use app\common\enum\coupon\ApplyRange as ApplyRangeEnum;
 
@@ -19,6 +20,13 @@
  */
 class Coupon extends CouponModel
 {
+    public function toArray(): array
+    {
+        return FixedScaleDecimalResponse::fields(parent::toArray(), [
+            'reduce_price', 'min_price', 'write_off_limit_amount',
+        ]);
+    }
+
     /**
      * 获取列表记录
      * @param array $param