diff --git a/weixin-java-open/src/main/java/me/chanjar/weixin/open/api/WxOpenMaService.java b/weixin-java-open/src/main/java/me/chanjar/weixin/open/api/WxOpenMaService.java
index 2b6e2d13a..c64156d04 100644
--- a/weixin-java-open/src/main/java/me/chanjar/weixin/open/api/WxOpenMaService.java
+++ b/weixin-java-open/src/main/java/me/chanjar/weixin/open/api/WxOpenMaService.java
@@ -295,6 +295,14 @@ public interface WxOpenMaService extends WxMaService {
    */
   WxOpenResult unbindTester(String wechatid) throws WxErrorException;
 
+  /**
+   * 解除绑定小程序体验者，其他平台绑定的体验者无法获取到wechatid，可用此方法解绑，详见文档
+   * https://developers.weixin.qq.com/doc/oplatform/Third-party_Platforms/Mini_Programs/unbind_tester.html
+   *
+   * @param userstr 人员对应的唯一字符串， 可通过获取已绑定的体验者列表获取人员对应的字符串
+   */
+  WxOpenResult unbindTesterByUserstr(String userstr) throws WxErrorException;
+
   /**
    * 获得体验者列表
    */
diff --git a/weixin-java-open/src/main/java/me/chanjar/weixin/open/api/impl/WxOpenMaServiceImpl.java b/weixin-java-open/src/main/java/me/chanjar/weixin/open/api/impl/WxOpenMaServiceImpl.java
index 1d30a57f1..6cbf584c3 100644
--- a/weixin-java-open/src/main/java/me/chanjar/weixin/open/api/impl/WxOpenMaServiceImpl.java
+++ b/weixin-java-open/src/main/java/me/chanjar/weixin/open/api/impl/WxOpenMaServiceImpl.java
@@ -194,6 +194,20 @@ public class WxOpenMaServiceImpl extends WxMaServiceImpl implements WxOpenMaServ
     return WxMaGsonBuilder.create().fromJson(response, WxOpenResult.class);
   }
 
+  /**
+   * 解除绑定小程序体验者
+   * @param userstr 人员对应的唯一字符串， 可通过获取已绑定的体验者列表获取人员对应的字符串
+   * @return
+   * @throws WxErrorException
+   */
+  @Override
+  public WxOpenResult unbindTesterByUserstr(String userstr) throws WxErrorException {
+    JsonObject paramJson = new JsonObject();
+    paramJson.addProperty("userstr", userstr);
+    String response = post(API_UNBIND_TESTER, GSON.toJson(paramJson));
+    return WxMaGsonBuilder.create().fromJson(response, WxOpenResult.class);
+  }
+
   /**
    * 获得体验者列表
    *