diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/request/WxPayRefundQueryV3Request.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/request/WxPayRefundQueryV3Request.java
index e7d34e31f9232916ca1856c200b9c1be56464ffd..977ca9ce52d6ff743bd937de1dc7e85e96df9761 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/request/WxPayRefundQueryV3Request.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/request/WxPayRefundQueryV3Request.java
@@ -29,4 +29,16 @@ public class WxPayRefundQueryV3Request implements Serializable {
    */
   @SerializedName(value = "out_refund_no")
   private String outRefundNo;
+  /**
+   * <pre>
+   * 字段名：子商户号
+   * 变量名：sub_mchid
+   * 是否必填：是
+   * 类型：string[1, 32]
+   * 描述：子商户的商户号，由微信支付生成并下发。
+   * 示例值：1900000109
+   * </pre>
+   */
+  @SerializedName(value = "sub_mchid")
+  private String subMchid;
 }
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/WxPayService.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/WxPayService.java
index 4384f46fa74a21087b495c34b64f712b4507de51..25150d1c8b79c9fa3591100a2feca6ee57d76d25 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/WxPayService.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/WxPayService.java
@@ -868,7 +868,7 @@ public interface WxPayService {
 
   /**
    * <pre>
-   * 微信支付-查询退款
+   * 微信支付-查询退款-直连商户
    * 应用场景：
    *  提交退款申请后，通过调用该接口查询退款状态。退款有一定延时，建议在提交退款申请后1分钟发起查询退款状态，一般来说零钱支付的退款5分钟内到账，银行卡支付的退款1-3个工作日到账。
    *  详见 <a href="https://pay.weixin.qq.com/wiki/doc/apiv3/apis/chapter3_1_10.shtml">https://pay.weixin.qq.com/wiki/doc/apiv3/apis/chapter3_1_10.shtml</a>
@@ -881,6 +881,21 @@ public interface WxPayService {
    */
   WxPayRefundQueryV3Result refundQueryV3(WxPayRefundQueryV3Request request) throws WxPayException;
 
+  /**
+   * <pre>
+   * 微信支付-查询退款-服务商
+   * 应用场景：
+   *  提交退款申请后，通过调用该接口查询退款状态。退款有一定延时，建议在提交退款申请后1分钟发起查询退款状态，一般来说零钱支付的退款5分钟内到账，银行卡支付的退款1-3个工作日到账。
+   *  详见 <a href="https://pay.weixin.qq.com/wiki/doc/apiv3_partner/apis/chapter4_1_10.shtml">https://pay.weixin.qq.com/wiki/doc/apiv3_partner/apis/chapter4_1_10.shtml</a>
+   * 接口链接：https://api.mch.weixin.qq.com/v3/refund/domestic/refunds/{out_refund_no}?sub_mchid={sub_mchid}
+   * </pre>
+   *
+   * @param request 微信退款单号
+   * @return 退款信息 wx pay refund query result
+   * @throws WxPayException the wx pay exception
+   */
+  WxPayRefundQueryV3Result refundQueryV3Isv(WxPayRefundQueryV3Request request) throws WxPayException;
+
   /**
    * 解析支付结果通知.
    * 详见https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_7
diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/BaseWxPayServiceImpl.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/BaseWxPayServiceImpl.java
index 694fcb768709533279c0e10a7e50c3d6a5741a0a..e8e296cbcab8ec0c306540a625e2697cc0b30ea9 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/BaseWxPayServiceImpl.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/service/impl/BaseWxPayServiceImpl.java
@@ -298,6 +298,13 @@ public abstract class BaseWxPayServiceImpl implements WxPayService {
     return GSON.fromJson(response, WxPayRefundQueryV3Result.class);
   }
 
+  @Override
+  public WxPayRefundQueryV3Result refundQueryV3Isv(WxPayRefundQueryV3Request request) throws WxPayException {
+    String url = String.format("%s/v3/refund/domestic/refunds/%s?sub_mchid=%s", this.getPayBaseUrl(), request.getOutRefundNo(),request.getSubMchid());
+    String response = this.getV3(url);
+    return GSON.fromJson(response, WxPayRefundQueryV3Result.class);
+  }
+
   @Override
   public WxPayOrderNotifyResult parseOrderNotifyResult(String xmlData) throws WxPayException {
     return this.parseOrderNotifyResult(xmlData, null);