diff --git a/services/implementation/include/dependency/softbus/softbus_connector.h b/services/implementation/include/dependency/softbus/softbus_connector.h
index 8e294678d0e400ed2a403c83da02f54b56dbd394..900855af774eb05e9fd21df4534ee7486a93a965 100644
--- a/services/implementation/include/dependency/softbus/softbus_connector.h
+++ b/services/implementation/include/dependency/softbus/softbus_connector.h
@@ -114,6 +114,13 @@ public:
      * @tc.type: FUNC
      */
     static void JoinLnn(const std::string &deviceId);
+
+    /**
+     * @tc.name: SoftbusConnector::LeaveLnn
+     * @tc.desc: delete the current device from the LNN where a specified device resides
+     * @tc.type: FUNC
+     */
+    static int32_t LeaveLnn(const std::string &networkId);
 public:
     SoftbusConnector();
     ~SoftbusConnector();
@@ -155,6 +162,7 @@ private:
     static void ConvertDeviceInfoToDmDevice(const DeviceInfo &deviceInfo, DmDeviceBasicInfo &dmDeviceBasicInfo);
     static ConnectionAddr *GetConnectAddrByType(DeviceInfo *deviceInfo, ConnectionAddrType type);
     static void ConvertNodeBasicInfoToDmDevice(const NodeBasicInfo &nodeBasicInfo, DmDeviceInfo &dmDeviceInfo);
+    static void OnLeaveLNNResult(const char *networkId, int32_t retCode);
 
 private:
     enum PulishStatus {
diff --git a/services/implementation/src/authentication/dm_auth_manager.cpp b/services/implementation/src/authentication/dm_auth_manager.cpp
index 37290304dd74016379ab42ff6c61974ed9df39bd..16453927d8a51b399d6ade486c9f0e325ed34703 100644
--- a/services/implementation/src/authentication/dm_auth_manager.cpp
+++ b/services/implementation/src/authentication/dm_auth_manager.cpp
@@ -296,6 +296,11 @@ int32_t DmAuthManager::UnBindDevice(const std::string &pkgName, const std::strin
         LOGE("Invalid parameter, pkgName is empty.");
         return ERR_DM_FAILED;
     }
+
+#ifdef MINE_HARMONY_HICHAIN
+    return softbusConnector_->LeaveLnn(udidHash);
+#endif
+
     if (authRequestState_!= nullptr || authResponseContext_ != nullptr) {
         if (isAuthenticateDevice_ && authRequestState_->GetStateType() == AuthState::AUTH_REQUEST_NEGOTIATE_DONE) {
             LOGI("Stop previous AuthenticateDevice.");
diff --git a/services/implementation/src/dependency/softbus/softbus_connector.cpp b/services/implementation/src/dependency/softbus/softbus_connector.cpp
index befc8cf1348a29c3b9eb9fd74d979c6e91503aad..8ddf946a3dcfb2fec99f9c17466dca6a1c802855 100644
--- a/services/implementation/src/dependency/softbus/softbus_connector.cpp
+++ b/services/implementation/src/dependency/softbus/softbus_connector.cpp
@@ -261,6 +261,15 @@ void SoftbusConnector::JoinLnn(const std::string &deviceId)
     return;
 }
 
+int32_t SoftbusConnector::LeaveLnn(const std::string &networkId)
+{
+    int32_t ret = ::LeaveLNN(DM_PKG_NAME, networkId.c_str(), OnLeaveLNNResult);
+    if (ret != DM_OK) {
+        LOGE("[SOFTBUS]JoinLNN failed, ret: %d.", ret);
+    }
+    return ret;
+}
+
 int32_t SoftbusConnector::GetUdidByNetworkId(const char *networkId, std::string &udid)
 {
     LOGI("start, networkId: %s.", GetAnonyString(std::string(networkId)).c_str());
@@ -416,6 +425,12 @@ void SoftbusConnector::OnSoftbusJoinLNNResult(ConnectionAddr *addr, const char *
     LOGD("[SOFTBUS]OnSoftbusJoinLNNResult, result: %d.", result);
 }
 
+void SoftbusConnector::OnLeaveLNNResult(const char *networkId, int32_t retCode)
+{
+    (void)networkId;
+    LOGI("[SOFTBUS]OnLeaveLNNResult, retCode: %d.", retCode);
+}
+
 void SoftbusConnector::OnSoftbusDeviceFound(const DeviceInfo *device)
 {
     if (device == nullptr) {