diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxSignQueryResult.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxSignQueryResult.java
index af19aec60..ca435f5b0 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxSignQueryResult.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxSignQueryResult.java
@@ -102,6 +102,36 @@ public class WxSignQueryResult extends BaseWxPayResult implements Serializable {
   @XStreamAlias("openid")
   private String openId;
 
+  /**
+   * 变更类型， ADD：签约，DELETE：解约
+   * 签约/解约回调通知时返回
+   */
+  @XStreamAlias("change_type")
+  private String changeType;
+
+  /**
+   * 操作时间
+   * 签约/解约回调通知时返回
+   */
+  @XStreamAlias("operate_time")
+  private String operateTime;
+
+  /**
+   * 为保持向后兼容保留的构造函数（不含 changeType、operateTime 字段）。
+   *
+   * @deprecated 请使用包含所有字段的全参构造函数。
+   */
+  @Deprecated
+  public WxSignQueryResult(String contractId, String planId, Long requestSerial,
+                           String contractCode, String contractDisplayAccount,
+                           Integer contractState, String contractSignedTime,
+                           String contractExpiredTime, String contractTerminatedTime,
+                           Integer contractTerminatedMode, String contractTerminationRemark,
+                           String openId) {
+    this(contractId, planId, requestSerial, contractCode, contractDisplayAccount,
+      contractState, contractSignedTime, contractExpiredTime, contractTerminatedTime,
+      contractTerminatedMode, contractTerminationRemark, openId, null, null);
+  }
 
   @Override
   protected void loadXml(Document d) {
@@ -117,6 +147,8 @@ protected void loadXml(Document d) {
     contractTerminatedMode = readXmlInteger(d, "contract_termination_mode");
     contractTerminationRemark = readXmlString(d, "contract_termination_remark");
     openId = readXmlString(d, "openid");
+    changeType = readXmlString(d, "change_type");
+    operateTime = readXmlString(d, "operate_time");
   }
 
   @Override
diff --git a/weixin-java-pay/src/test/java/com/github/binarywang/wxpay/bean/result/WxSignQueryResultTest.java b/weixin-java-pay/src/test/java/com/github/binarywang/wxpay/bean/result/WxSignQueryResultTest.java
index 52df2b6e2..12d62b148 100644
--- a/weixin-java-pay/src/test/java/com/github/binarywang/wxpay/bean/result/WxSignQueryResultTest.java
+++ b/weixin-java-pay/src/test/java/com/github/binarywang/wxpay/bean/result/WxSignQueryResultTest.java
@@ -117,9 +117,74 @@ public void testFromXML_RequiredFieldsOnly() {
       Assert.assertNull(result.getContractTerminatedTime());
       Assert.assertNull(result.getContractTerminatedMode());
       Assert.assertNull(result.getContractTerminationRemark());
+      Assert.assertNull(result.getChangeType());
+      Assert.assertNull(result.getOperateTime());
     } finally {
       // 恢复默认值
       XmlConfig.fastMode = false;
     }
   }
+
+  /**
+   * 测试签约回调通知 XML 解析 - change_type = ADD
+   */
+  @Test
+  public void testFromXML_SignCallback_Add() {
+    String xmlString = "<xml>\n" +
+      "  <return_code><![CDATA[SUCCESS]]></return_code>\n" +
+      "  <appid><![CDATA[wx426b3015555b46be]]></appid>\n" +
+      "  <mch_id><![CDATA[10000098]]></mch_id>\n" +
+      "  <contract_id><![CDATA[Wx15463511252015071056489715]]></contract_id>\n" +
+      "  <plan_id>123</plan_id>\n" +
+      "  <openid><![CDATA[ozoKAt9TIPHfwVMkcniiNKZ1vbyw]]></openid>\n" +
+      "  <request_serial>1695</request_serial>\n" +
+      "  <contract_code><![CDATA[100001256]]></contract_code>\n" +
+      "  <change_type><![CDATA[ADD]]></change_type>\n" +
+      "  <operate_time>2015-07-01 10:00:00</operate_time>\n" +
+      "  <contract_expired_time>2016-07-01 10:00:00</contract_expired_time>\n" +
+      "  <sign><![CDATA[C380BEC2BFD727A4B6845133519F3AD6]]></sign>\n" +
+      "</xml>";
+
+    XmlConfig.fastMode = true;
+    try {
+      WxSignQueryResult result = WxSignQueryResult.fromXML(xmlString, WxSignQueryResult.class);
+
+      Assert.assertEquals(result.getChangeType(), "ADD");
+      Assert.assertEquals(result.getOperateTime(), "2015-07-01 10:00:00");
+    } finally {
+      XmlConfig.fastMode = false;
+    }
+  }
+
+  /**
+   * 测试解约回调通知 XML 解析 - change_type = DELETE
+   */
+  @Test
+  public void testFromXML_SignCallback_Delete() {
+    String xmlString = "<xml>\n" +
+      "  <return_code><![CDATA[SUCCESS]]></return_code>\n" +
+      "  <appid><![CDATA[wx426b3015555b46be]]></appid>\n" +
+      "  <mch_id><![CDATA[10000098]]></mch_id>\n" +
+      "  <contract_id><![CDATA[Wx15463511252015071056489715]]></contract_id>\n" +
+      "  <plan_id>123</plan_id>\n" +
+      "  <openid><![CDATA[ozoKAt9TIPHfwVMkcniiNKZ1vbyw]]></openid>\n" +
+      "  <request_serial>1695</request_serial>\n" +
+      "  <contract_code><![CDATA[100001256]]></contract_code>\n" +
+      "  <change_type><![CDATA[DELETE]]></change_type>\n" +
+      "  <operate_time>2015-07-01 11:00:00</operate_time>\n" +
+      "  <contract_termination_mode>2</contract_termination_mode>\n" +
+      "  <sign><![CDATA[C380BEC2BFD727A4B6845133519F3AD6]]></sign>\n" +
+      "</xml>";
+
+    XmlConfig.fastMode = true;
+    try {
+      WxSignQueryResult result = WxSignQueryResult.fromXML(xmlString, WxSignQueryResult.class);
+
+      Assert.assertEquals(result.getChangeType(), "DELETE");
+      Assert.assertEquals(result.getOperateTime(), "2015-07-01 11:00:00");
+      Assert.assertEquals(result.getContractTerminatedMode().intValue(), 2);
+    } finally {
+      XmlConfig.fastMode = false;
+    }
+  }
 }