diff --git a/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/bean/WxMaMessage.java b/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/bean/WxMaMessage.java
index 508bf9745..642191001 100644
--- a/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/bean/WxMaMessage.java
+++ b/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/bean/WxMaMessage.java
@@ -189,7 +189,7 @@ public class WxMaMessage implements Serializable {
   @XStreamConverter(value = XStreamCDataConverter.class)
   private String revokeInfo;
 
-  @SerializedName("OpenID")
+  @SerializedName(value = "OpenID", alternate = {"OpenId"})
   @XStreamAlias("OpenID")
   @XStreamConverter(value = XStreamCDataConverter.class)
   private String openId;
@@ -418,6 +418,52 @@ public class WxMaMessage implements Serializable {
   @XStreamAlias("TeamInfo")
   private WxMaXPayTeamInfo teamInfo;
 
+  // xpay_complaint_notify 用户投诉推送字段
+
+  /**
+   * 微信支付交易单号.
+   * xpay_complaint_notify
+   */
+  @SerializedName("TransactionId")
+  @XStreamAlias("TransactionId")
+  @XStreamConverter(value = XStreamCDataConverter.class)
+  private String complaintTransactionId;
+
+  /**
+   * 投诉单号.
+   * xpay_complaint_notify
+   */
+  @SerializedName("ComplaintId")
+  @XStreamAlias("ComplaintId")
+  @XStreamConverter(value = XStreamCDataConverter.class)
+  private String complaintId;
+
+  /**
+   * 投诉详情.
+   * xpay_complaint_notify
+   */
+  @SerializedName("ComplaintDetail")
+  @XStreamAlias("ComplaintDetail")
+  @XStreamConverter(value = XStreamCDataConverter.class)
+  private String complaintDetail;
+
+  /**
+   * 投诉时间，秒级时间戳.
+   * xpay_complaint_notify
+   */
+  @SerializedName("ComplaintTime")
+  @XStreamAlias("ComplaintTime")
+  private Long complaintTime;
+
+  /**
+   * 请求编号.
+   * xpay_complaint_notify
+   */
+  @SerializedName("RequestId")
+  @XStreamAlias("RequestId")
+  @XStreamConverter(value = XStreamCDataConverter.class)
+  private String requestId;
+
   /**
    * 不要直接使用这个字段，
    * 这个字段只是为了适配 SubscribeMsgPopupEvent SubscribeMsgChangeEvent SubscribeMsgSentEvent
diff --git a/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/constant/WxMaConstants.java b/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/constant/WxMaConstants.java
index eed700631..0fcf3b10f 100644
--- a/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/constant/WxMaConstants.java
+++ b/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/constant/WxMaConstants.java
@@ -261,9 +261,10 @@ public static final class XPayOrderStatus {
   }
   @UtilityClass
   public static final class XPayNotifyEvent {
-    public static String COIN_PAY = "xpay_coin_pay_notify";
-    public static String GOODS_DELIVER = "xpay_goods_deliver_notify";
-    public static String REFUND = "xpay_refund_notify";
+    public static final String COIN_PAY = "xpay_coin_pay_notify";
+    public static final String GOODS_DELIVER = "xpay_goods_deliver_notify";
+    public static final String REFUND = "xpay_refund_notify";
+    public static final String COMPLAINT = "xpay_complaint_notify";
 
   }
   @UtilityClass
diff --git a/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/util/xml/XStreamTransformer.java b/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/util/xml/XStreamTransformer.java
index b9e80d734..085a25f69 100644
--- a/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/util/xml/XStreamTransformer.java
+++ b/weixin-java-miniapp/src/main/java/cn/binarywang/wx/miniapp/util/xml/XStreamTransformer.java
@@ -101,6 +101,8 @@ private static void registerClass(Class<?> clz) {
     if (clz.equals(WxMaMessage.class)) {
       // 操蛋的微信，模板消息推送成功的消息是MsgID，其他消息推送过来是MsgId
       xstream.aliasField("MsgID", WxMaMessage.class, "msgId");
+      // xpay 事件推送使用 OpenId（小写 d），但通用字段注解为 OpenID（大写 D）
+      xstream.aliasField("OpenId", WxMaMessage.class, "openId");
     }
 
     register(clz, xstream);
diff --git a/weixin-java-miniapp/src/test/java/cn/binarywang/wx/miniapp/bean/WxMaMessageTest.java b/weixin-java-miniapp/src/test/java/cn/binarywang/wx/miniapp/bean/WxMaMessageTest.java
index 00821eb63..3f7e15426 100644
--- a/weixin-java-miniapp/src/test/java/cn/binarywang/wx/miniapp/bean/WxMaMessageTest.java
+++ b/weixin-java-miniapp/src/test/java/cn/binarywang/wx/miniapp/bean/WxMaMessageTest.java
@@ -388,4 +388,73 @@ private void checkXPayRefundNotifyMessage(WxMaMessage msg) {
     assertEquals(teamInfo.getTeamType(), new Integer(1));
     assertEquals(teamInfo.getTeamAction(), new Integer(0));
   }
+
+  /**
+   * 虚拟支付投诉推送事件 xpay_complaint_notify 测试用例（XML格式）
+   */
+  @Test
+  public void testXPayComplaintNotifyFromXml() {
+    String xml = "<xml>\n" +
+      "  <ToUserName><![CDATA[gh_abcdefg]]></ToUserName>\n" +
+      "  <FromUserName><![CDATA[official_openid]]></FromUserName>\n" +
+      "  <CreateTime>1700000100</CreateTime>\n" +
+      "  <MsgType><![CDATA[event]]></MsgType>\n" +
+      "  <Event><![CDATA[xpay_complaint_notify]]></Event>\n" +
+      "  <OpenId><![CDATA[user_openid_abc]]></OpenId>\n" +
+      "  <WxOrderId><![CDATA[wx_order_cmp_001]]></WxOrderId>\n" +
+      "  <MchOrderId><![CDATA[mch_order_cmp_002]]></MchOrderId>\n" +
+      "  <TransactionId><![CDATA[transaction_cmp_003]]></TransactionId>\n" +
+      "  <ComplaintId><![CDATA[complaint_004]]></ComplaintId>\n" +
+      "  <ComplaintDetail><![CDATA[商品未收到]]></ComplaintDetail>\n" +
+      "  <ComplaintTime>1700000050</ComplaintTime>\n" +
+      "  <RetryTimes>0</RetryTimes>\n" +
+      "  <RequestId><![CDATA[req_005]]></RequestId>\n" +
+      "</xml>";
+
+    WxMaMessage msg = WxMaMessage.fromXml(xml);
+    checkXPayComplaintNotifyMessage(msg);
+  }
+
+  /**
+   * 虚拟支付投诉推送事件 xpay_complaint_notify 测试用例（JSON格式）
+   */
+  @Test
+  public void testXPayComplaintNotifyFromJson() {
+    String json = "{\n" +
+      "  \"ToUserName\": \"gh_abcdefg\",\n" +
+      "  \"FromUserName\": \"official_openid\",\n" +
+      "  \"CreateTime\": 1700000100,\n" +
+      "  \"MsgType\": \"event\",\n" +
+      "  \"Event\": \"xpay_complaint_notify\",\n" +
+      "  \"OpenId\": \"user_openid_abc\",\n" +
+      "  \"WxOrderId\": \"wx_order_cmp_001\",\n" +
+      "  \"MchOrderId\": \"mch_order_cmp_002\",\n" +
+      "  \"TransactionId\": \"transaction_cmp_003\",\n" +
+      "  \"ComplaintId\": \"complaint_004\",\n" +
+      "  \"ComplaintDetail\": \"商品未收到\",\n" +
+      "  \"ComplaintTime\": 1700000050,\n" +
+      "  \"RetryTimes\": 0,\n" +
+      "  \"RequestId\": \"req_005\"\n" +
+      "}";
+
+    WxMaMessage msg = WxMaMessage.fromJson(json);
+    checkXPayComplaintNotifyMessage(msg);
+  }
+
+  private void checkXPayComplaintNotifyMessage(WxMaMessage msg) {
+    assertEquals(msg.getToUser(), "gh_abcdefg");
+    assertEquals(msg.getFromUser(), "official_openid");
+    assertEquals(msg.getCreateTime(), new Integer(1700000100));
+    assertEquals(msg.getMsgType(), WxConsts.XmlMsgType.EVENT);
+    assertEquals(msg.getEvent(), "xpay_complaint_notify");
+    assertEquals(msg.getOpenId(), "user_openid_abc");
+    assertEquals(msg.getWxOrderId(), "wx_order_cmp_001");
+    assertEquals(msg.getMchOrderId(), "mch_order_cmp_002");
+    assertEquals(msg.getComplaintTransactionId(), "transaction_cmp_003");
+    assertEquals(msg.getComplaintId(), "complaint_004");
+    assertEquals(msg.getComplaintDetail(), "商品未收到");
+    assertEquals(msg.getComplaintTime(), new Long(1700000050L));
+    assertEquals(msg.getRetryTimes(), new Integer(0));
+    assertEquals(msg.getRequestId(), "req_005");
+  }
 }