diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/CouponUseRule.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/CouponUseRule.java
index bc7fba6..b9566b4 100644
--- a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/CouponUseRule.java
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/CouponUseRule.java
@@ -22,7 +22,7 @@ import lombok.Data;
 import java.util.List;
 
 /**
- * 核销规则.
+ * 代金券核销规则.
  *
  * @author felord.cn
  * @since 1.0.0.RELEASE
@@ -74,8 +74,9 @@ public class CouponUseRule {
      *   <li>FACE：人脸支付</li>
      *   <li>OTHER：其他支付</li>
      * </ul>
+     * 不填则默认“不限”
      */
-    private String tradeType;
+    private CouponTradeType tradeType;
 
 
     /**
@@ -100,4 +101,50 @@ public class CouponUseRule {
          */
         private List<String> bin;
     }
+
+    /**
+     * 代金券核销规则-支付方式.
+     *
+     * @author felord.cn
+     * @since 1.0.4.RELEASE
+     */
+    public enum CouponTradeType {
+        /**
+         * 小程序支付
+         *
+         * @since 1.0.4.RELEASE
+         */
+        MICROAPP,
+        /**
+         * APP支付
+         *
+         * @since 1.0.4.RELEASE
+         */
+        APPPAY,
+        /**
+         * 免密支付
+         *
+         * @since 1.0.4.RELEASE
+         */
+        PPAY,
+        /**
+         * 刷卡支付
+         *
+         * @since 1.0.4.RELEASE
+         */
+        CARD,
+        /**
+         * 人脸支付
+         *
+         * @since 1.0.4.RELEASE
+         */
+        FACE,
+        /**
+         * 其他支付
+         *
+         * @since 1.0.4.RELEASE
+         */
+        OTHER,
+    }
+
 }