diff --git a/plugins/netconnect/netconnect.cpp b/plugins/netconnect/netconnect.cpp
index 18d0084d..71bb66ee 100644
--- a/plugins/netconnect/netconnect.cpp
+++ b/plugins/netconnect/netconnect.cpp
@@ -168,7 +168,9 @@ bool NetConnect::eventFilter(QObject *w, QEvent *e) {
             if (!wiredSwitch->isCheckable()) {
                 showDesktopNotify(tr("No ethernet device avaliable"));
             } else {
-                m_interface->call(QStringLiteral("setWiredSwitchEnable"), !wiredSwitch->isChecked());
+                if (m_interface != nullptr && m_interface->isValid()) {
+                    m_interface->call(QStringLiteral("setWiredSwitchEnable"), !wiredSwitch->isChecked());
+                }
                 return true;
             }
         }
@@ -242,7 +244,7 @@ void NetConnect::initComponent() {
 //获取网卡列表
 void NetConnect::getDeviceStatusMap(QMap<QString, bool> &map)
 {
-    if (!m_interface->isValid()) {
+    if (m_interface == nullptr || !m_interface->isValid()) {
         return;
     }
     qDebug() << "[NetConnect]call getDeviceListAndEnabled"  << __LINE__;
@@ -357,6 +359,9 @@ void NetConnect::runExternalApp() {
 
 //激活
 void NetConnect::activeConnect(QString ssid, QString deviceName, int type) {
+    if (m_interface == nullptr || !m_interface->isValid()) {
+        return;
+    }
     qDebug() << "[NetConnect]call activateConnect" << __LINE__;
     m_interface->call(QStringLiteral("activateConnect"),type, deviceName, ssid);
     qDebug() << "[NetConnect]call activateConnect respond" << __LINE__;
@@ -364,6 +369,9 @@ void NetConnect::activeConnect(QString ssid, QString deviceName, int type) {
 
 //断开
 void NetConnect::deActiveConnect(QString ssid, QString deviceName, int type) {
+    if (m_interface == nullptr || !m_interface->isValid()) {
+        return;
+    }
     qDebug() << "[NetConnect]call deActivateConnect" << __LINE__;
     m_interface->call(QStringLiteral("deActivateConnect"),type, deviceName, ssid);
     qDebug() << "[NetConnect]call deActivateConnect respond" << __LINE__;
@@ -377,7 +385,7 @@ void NetConnect::initNetListFromDevice(QString deviceName)
         qDebug() << "[NetConnect]initNetListFromDevice " << deviceName << " not exist";
         return;
     }
-    if (!m_interface->isValid()) {
+    if (m_interface == nullptr || !m_interface->isValid()) {
         return;
     }
     qDebug() << "[NetConnect]call getWiredList"  << __LINE__;
@@ -442,7 +450,7 @@ void NetConnect::addLanItem(ItemFrame *frame, QString devName, QStringList infoL
 
     connect(lanItem->infoLabel, &GrayInfoButton::clicked, this, [=]{
         // open landetail page
-        if (!m_interface->isValid()) {
+        if (m_interface == nullptr || !m_interface->isValid()) {
             return;
         }
         qDebug() << "[NetConnect]call showPropertyWidget" << __LINE__;
@@ -469,6 +477,9 @@ void NetConnect::addLanItem(ItemFrame *frame, QString devName, QStringList infoL
 //增加设备
 void NetConnect::addDeviceFrame(QString devName)
 {
+    if (m_interface == nullptr || !m_interface->isValid()) {
+        return;
+    }
     qDebug() << "[NetConnect]addDeviceFrame " << devName;
 
     qDebug() << "[NetConnect]call getDeviceListAndEnabled"  << __LINE__;
@@ -528,7 +539,7 @@ void NetConnect::addDeviceFrame(QString devName)
     });
 
     connect(itemFrame->addLanWidget, &AddNetBtn::clicked, this, [=](){
-        if (m_interface->isValid()) {
+        if (m_interface != nullptr && m_interface->isValid()) {
             qDebug() << "[NetConnect]call showCreateWiredConnectWidget" << devName  << __LINE__;
             m_interface->call(QStringLiteral("showCreateWiredConnectWidget"), devName);
             qDebug() << "[NetConnect]call setDeviceEnable Respond"  << __LINE__;
@@ -725,7 +736,7 @@ void NetConnect::addOneLanFrame(ItemFrame *frame, QString deviceName, QStringLis
 
     connect(lanItem->infoLabel, &GrayInfoButton::clicked, this, [=]{
         // open landetail page
-        if (!m_interface->isValid()) {
+        if (m_interface == nullptr || !m_interface->isValid()) {
             return;
         }
         qDebug() << "[NetConnect]call showPropertyWidget" << deviceName << connUuid << __LINE__;
@@ -867,7 +878,7 @@ int NetConnect::getInsertPos(QString connName, QString deviceName)
 {
     qDebug() << "[NetConnect]getInsertPos" << connName << deviceName;
     int index = 0;
-    if(!m_interface->isValid()) {
+    if(m_interface == nullptr || !m_interface->isValid()) {
         index = 0;
     } else {
         qDebug() << "[NetConnect]call getWiredList"  << __LINE__;
diff --git a/plugins/proxy/applistwidget.cpp b/plugins/proxy/applistwidget.cpp
index c3c87109..9d4e938e 100644
--- a/plugins/proxy/applistwidget.cpp
+++ b/plugins/proxy/applistwidget.cpp
@@ -29,7 +29,7 @@ AppListWidget::AppListWidget(QString path, QWidget *parent)
 
 AppListWidget::~AppListWidget()
 {
-
+    delete m_dbusInterface;
 }
 
 /**
@@ -79,8 +79,9 @@ void AppListWidget::onAppCheckStateChanged()
  */
 void AppListWidget::AddAppProxyConfig()
 {
-    if(!m_dbusInterface->isValid()) {
+    if(m_dbusInterface == nullptr || !m_dbusInterface->isValid()) {
         qWarning ()<< "init AppProxy dbus error";
+        return;
     }
 
     qDebug() << "call QDBusInterface addAppIntoProxy";
@@ -93,8 +94,9 @@ void AppListWidget::AddAppProxyConfig()
  */
 void AppListWidget::RemoveAppProxyConfig()
 {
-    if(!m_dbusInterface->isValid()) {
+    if(m_dbusInterface == nullptr || !m_dbusInterface->isValid()) {
         qWarning ()<< "init AppProxy dbus error";
+        return;
     }
 
     qDebug() << "call QDBusInterface delAppIntoProxy";
@@ -135,4 +137,7 @@ void AppListWidget::initDbus()
                        "/org/ukui/SettingsDaemon/AppProxy",
                        "org.ukui.SettingsDaemon.AppProxy",
                        QDBusConnection::sessionBus());
+    if(!m_dbusInterface->isValid()) {
+        qWarning() << qPrintable(QDBusConnection::sessionBus().lastError().message());
+    }
 }
diff --git a/plugins/proxy/proxy.cpp b/plugins/proxy/proxy.cpp
index f2ade081..36efe061 100644
--- a/plugins/proxy/proxy.cpp
+++ b/plugins/proxy/proxy.cpp
@@ -67,7 +67,8 @@ Proxy::Proxy() : mFirstLoad(true)
 Proxy::~Proxy()
 {
     if (!mFirstLoad) {
-            plugin_leave();
+        plugin_leave();
+        delete m_appProxyDbus;
     }
 }
 
@@ -702,6 +703,9 @@ void Proxy::initDbus()
                        "/org/ukui/SettingsDaemon/AppProxy",
                        "org.ukui.SettingsDaemon.AppProxy",
                        QDBusConnection::sessionBus());
+    if(!m_appProxyDbus->isValid()) {
+        qWarning() << qPrintable(QDBusConnection::sessionBus().lastError().message());
+    }
 }
 
 void Proxy::initAppProxyStatus()
@@ -752,8 +756,11 @@ void Proxy::setAptProxy(QString host, QString port, bool status)
                                                              "/",
                                                              "com.control.center.interface",
                                                              QDBusConnection::systemBus());
-    if (mAptproxyDbus->isValid())
+    if (mAptproxyDbus->isValid()) {
         QDBusReply<bool> reply = mAptproxyDbus->call("setaptproxy", host, port , status);
+    }
+    delete mAptproxyDbus;
+    mAptproxyDbus = nullptr;
 }
 
 QHash<QString, QVariant> Proxy::getAptProxy()
@@ -786,6 +793,8 @@ QHash<QString, QVariant> Proxy::getAptProxy()
             mAptInfo.insert(it.arg, it.out.variant());
         }
     }
+    delete mAptproxyDbus;
+    mAptproxyDbus = nullptr;
     return mAptInfo;
 }
 
@@ -814,8 +823,9 @@ void Proxy::reboot()
                                                              "/org/gnome/SessionManager",
                                                              "org.gnome.SessionManager",
                                                              QDBusConnection::sessionBus());
-
-    rebootDbus->call("reboot");
+    if (rebootDbus->isValid()) {
+        rebootDbus->call("reboot");
+    }
     delete rebootDbus;
     rebootDbus = nullptr;
 }
@@ -841,8 +851,9 @@ QFrame *Proxy::setLine(QFrame *frame)
 bool Proxy::getAppProxyState()
 {
     bool state = true;
-    if(!m_appProxyDbus->isValid()) {
+    if(m_appProxyDbus == nullptr || !m_appProxyDbus->isValid()) {
         qWarning ()<< "init AppProxy dbus error";
+        return false;
     }
 
     //获取应用代理开启状态
@@ -859,7 +870,7 @@ bool Proxy::getAppProxyState()
 
 void Proxy::setAppProxyState(bool state)
 {
-    if(!m_appProxyDbus->isValid()) {
+    if(m_appProxyDbus == nullptr || !m_appProxyDbus->isValid()) {
         qWarning ()<< "init AppProxy dbus error";
         return;
     }
@@ -881,6 +892,7 @@ QStringList Proxy::getAppProxyConf()
 
     if(!dbusInterface.isValid()) {
         qWarning ()<< "init AppProxy dbus error";
+        return info;
     }
 
     //获取应用代理配置信息
@@ -903,11 +915,12 @@ QStringList Proxy::getAppProxyConf()
 
 void Proxy::setAppProxyConf(QStringList list)
 {
+    //AppProxyConf 必填项数量为3
     if (list.count() < 3) {
         return;
     }
 
-    if(!m_appProxyDbus->isValid()) {
+    if(m_appProxyDbus == nullptr || !m_appProxyDbus->isValid()) {
         qWarning ()<< "init AppProxy dbus error";
         return;
     }
@@ -1244,7 +1257,6 @@ void Proxy::onAppProxyConfChanged()
 {
     if (!getipEditState(m_ipAddressLineEdit->text()) || m_portLineEdit->text().isEmpty()) {
         return;
-        qDebug() << "onAppProxyConfChanged return";
     }
 
     if (m_ipAddressLineEdit->text().isEmpty()) {
@@ -1261,8 +1273,6 @@ void Proxy::onAppProxyConfChanged()
             m_appProxyInfo.append("");
             m_appProxyInfo.append("");
         }
-
-        qDebug() << m_appProxyInfo << Q_FUNC_INFO << __LINE__;
     }
 }
 
diff --git a/plugins/proxy/proxy.h b/plugins/proxy/proxy.h
index e2cb2c11..5f6b6e0b 100644
--- a/plugins/proxy/proxy.h
+++ b/plugins/proxy/proxy.h
@@ -262,8 +262,8 @@ private:
     QFileSystemWatcher *mfileWatch_1;
     QFileSystemWatcher *mfileWatch_2;
 
-    QDBusInterface *mAptproxyDbus;
-    QDBusInterface *m_appProxyDbus;
+//    QDBusInterface *mAptproxyDbus;
+    QDBusInterface *m_appProxyDbus = nullptr;
 
     bool isExistSettings = false;
     bool settingsCreate;
diff --git a/plugins/wlanconnect/wlanconnect.cpp b/plugins/wlanconnect/wlanconnect.cpp
index 4ac0fe0f..0e2402c5 100644
--- a/plugins/wlanconnect/wlanconnect.cpp
+++ b/plugins/wlanconnect/wlanconnect.cpp
@@ -227,7 +227,9 @@ bool WlanConnect::eventFilter(QObject *w, QEvent *e) {
             if (!getSwitchBtnEnable()) {
                 showDesktopNotify(tr("No wireless network card detected"));
             } else {
-                m_interface->call(QStringLiteral("setWirelessSwitchEnable"), !getSwitchBtnState());
+                if (m_interface != nullptr && m_interface->isValid()) {
+                    m_interface->call(QStringLiteral("setWirelessSwitchEnable"), !getSwitchBtnState());
+                }
                 return true;
             }
         }
@@ -298,7 +300,7 @@ void WlanConnect::initComponent() {
 void WlanConnect::reScan()
 {
     qDebug() << "time to rescan wifi";
-    if (m_interface->isValid()) {
+    if (m_interface != nullptr && m_interface->isValid()) {
         qDebug() << "[WlanConnect]call reScan" << __LINE__;
         m_interface->call("reScan");
         qDebug() << "[WlanConnect]call reScan respond" << __LINE__;
@@ -312,7 +314,7 @@ void WlanConnect::updateList()
         return;
     }
     qDebug() << "update list";
-    if(m_interface->isValid()) {
+    if(m_interface != nullptr && m_interface->isValid()) {
         qDebug() << "[WlanConnect]call getWirelessList" << __LINE__;
         QDBusMessage result = m_interface->call(QStringLiteral("getWirelessList"));
         qDebug() << "[WlanConnect]call getWirelessList respond" << __LINE__;
@@ -684,7 +686,7 @@ void WlanConnect::onNetworkRemove(QString deviceName, QString wlannName)
 //获取设备列表=======================================================
 void WlanConnect::getDeviceList(QStringList &list)
 {
-    if (!m_interface->isValid()) {
+    if (m_interface == nullptr || !m_interface->isValid()) {
         return;
     }
     qDebug() << "[WlanConnect]call getDeviceListAndEnabled"  << __LINE__;
@@ -703,7 +705,7 @@ void WlanConnect::getDeviceList(QStringList &list)
 
 void WlanConnect::initSwtichState()
 {
-    if (!m_interface->isValid()) {
+    if (m_interface == nullptr || !m_interface->isValid()) {
         return;
     }
 
@@ -745,7 +747,7 @@ void WlanConnect::initNetListFromDevice(QString deviceName)
         qDebug() << "[WlanConnect]initNetListFromDevice " << deviceName << " not exist";
         return;
     }
-    if (!m_interface->isValid()) {
+    if (m_interface == nullptr || !m_interface->isValid()) {
         return;
     }
     qDebug() << "[WlanConnect]call getWirelessList"  << __LINE__;
@@ -878,6 +880,9 @@ void WlanConnect::showLayout(QVBoxLayout * layout) {
 //获取应该插入哪个位置
 int WlanConnect::sortWlanNet(QString deviceName, QString name, QString signal)
 {
+    if (m_interface == nullptr || !m_interface->isValid()) {
+        return 0;
+    }
     qDebug() << "[WlanConnect]call getWirelessList"  << __LINE__;
     QDBusMessage result = m_interface->call(QStringLiteral("getWirelessList"));
     qDebug() << "[WlanConnect]call getWirelessList respond"  << __LINE__;
@@ -904,7 +909,7 @@ int WlanConnect::sortWlanNet(QString deviceName, QString name, QString signal)
 }
 
 void WlanConnect::activeConnect(QString netName, QString deviceName, int type) {
-    if (!m_interface->isValid()) {
+    if (m_interface == nullptr || !m_interface->isValid()) {
         return;
     }
     qDebug() << "[WlanConnect]call activateConnect" << __LINE__;
@@ -913,7 +918,7 @@ void WlanConnect::activeConnect(QString netName, QString deviceName, int type) {
 }
 
 void WlanConnect::deActiveConnect(QString netName, QString deviceName, int type) {
-    if (!m_interface->isValid()) {
+    if (m_interface == nullptr || !m_interface->isValid()) {
         return;
     }
     qDebug() << "[WlanConnect]call deActivateConnect" << __LINE__;
@@ -966,7 +971,7 @@ void WlanConnect::addDeviceFrame(QString devName)
     deviceFrameMap.insert(devName, itemFrame);
 
     connect(itemFrame->addWlanWidget, &AddNetBtn::clicked, this, [=](){
-        if (m_interface->isValid()) {
+        if (m_interface != nullptr && m_interface->isValid()) {
             qDebug() << "[NetConnect]call showAddOtherWlanWidget" << devName  << __LINE__;
             m_interface->call(QStringLiteral("showAddOtherWlanWidget"), devName);
             qDebug() << "[NetConnect]call setDeviceEnable Respond"  << __LINE__;
@@ -1034,7 +1039,7 @@ void WlanConnect::addOneWlanFrame(ItemFrame *frame, QString deviceName, QString
 
     connect(wlanItem->infoLabel, &GrayInfoButton::clicked, this, [=]{
         // open detail page
-        if (!m_interface->isValid()) {
+        if (m_interface == nullptr || !m_interface->isValid()) {
             return;
         }
         qDebug() << "[WlanConnect]call showPropertyWidget" << __LINE__;
diff --git a/src/frontend/networkmode/networkmodeconfig.cpp b/src/frontend/networkmode/networkmodeconfig.cpp
index fa19cc6c..507f8e83 100644
--- a/src/frontend/networkmode/networkmodeconfig.cpp
+++ b/src/frontend/networkmode/networkmodeconfig.cpp
@@ -37,6 +37,9 @@ NetworkModeConfig::NetworkModeConfig(QObject *parent) : QObject(parent)
                        "/firewall",
                        "com.ksc.defender.firewall",
                        QDBusConnection::systemBus());
+    if(!m_dbusInterface->isValid()) {
+        qWarning() << qPrintable(QDBusConnection::sessionBus().lastError().message());
+    }
 }
 
 int NetworkModeConfig::getNetworkModeConfig(QString uuid)
@@ -46,8 +49,9 @@ int NetworkModeConfig::getNetworkModeConfig(QString uuid)
            return -1;
        }
 
-    if(!m_dbusInterface->isValid()) {
-        qWarning ()<< "init com.ksc.defender dbus error";
+    if(m_dbusInterface == nullptr || !m_dbusInterface->isValid()) {
+        qWarning () << "com.ksc.defender dbus is invalid";
+        return -1;
     }
 
     QDBusReply<int> reply = m_dbusInterface->call("get_networkModeConfig", uuid);
@@ -61,8 +65,9 @@ int NetworkModeConfig::getNetworkModeConfig(QString uuid)
 
 void NetworkModeConfig::setNetworkModeConfig(QString uuid, QString cardName, QString ssid, int mode)
 {
-    if(!m_dbusInterface->isValid()) {
-        qWarning ()<< "init com.ksc.defender dbus error";
+    if(m_dbusInterface == nullptr || !m_dbusInterface->isValid()) {
+        qWarning () << "com.ksc.defender dbus is invalid";
+        return;
     }
 
     QDBusReply<int> reply = m_dbusInterface->call("set_networkModeConfig", uuid, cardName, ssid, mode);
@@ -75,8 +80,9 @@ void NetworkModeConfig::setNetworkModeConfig(QString uuid, QString cardName, QSt
 
 int NetworkModeConfig::breakNetworkConnect(QString uuid, QString cardName, QString ssid)
 {
-    if(!m_dbusInterface->isValid()) {
-        qWarning ()<< "init com.ksc.defender dbus error";
+    if(m_dbusInterface == nullptr || !m_dbusInterface->isValid()) {
+        qWarning () << "com.ksc.defender dbus is invalid";
+        return -1;
     }
 
     QDBusReply<int> reply = m_dbusInterface->call("break_networkConnect", uuid, cardName, ssid);