diff --git a/src/frontend/tab-pages/lanpage.cpp b/src/frontend/tab-pages/lanpage.cpp
index da63292d..a5a04a7a 100644
--- a/src/frontend/tab-pages/lanpage.cpp
+++ b/src/frontend/tab-pages/lanpage.cpp
@@ -155,10 +155,11 @@ void LanPage::initNetSwitch()
         m_switchGsettings->set(WIRED_SWITCH, wiredEnable);
     }
 
-    bool oldState;
-    if (getOldWiredSwitchState(oldState)) {
-        if (wiredEnable != oldState) {
-            m_wiredConnectOperation->setWiredEnabled(oldState);
+    //从3.0升级上来 先读取老的配置文件来保证和升级前状态一致
+    bool oldVersionState;
+    if (getOldVersionWiredSwitchState(oldVersionState)) {
+        if (wiredEnable != oldVersionState) {
+            m_wiredConnectOperation->setWiredEnabled(oldVersionState);
         }
     }
 
diff --git a/src/frontend/tab-pages/tabpage.cpp b/src/frontend/tab-pages/tabpage.cpp
index d5a9a856..342e8f67 100644
--- a/src/frontend/tab-pages/tabpage.cpp
+++ b/src/frontend/tab-pages/tabpage.cpp
@@ -302,15 +302,19 @@ void getDeviceEnableState(int type, QMap<QString, bool> &map)
     kdr = nullptr;
 }
 
-bool getOldWiredSwitchState(bool state)
+bool getOldVersionWiredSwitchState(bool state)
 {
     QSettings * m_settings = new QSettings(CONFIG_FILE_PATH, QSettings::IniFormat);
     QVariant value = m_settings->value("lan_switch_opened");
 
-    if (!value.isValid())
+    if (!value.isValid()) {
+        delete m_settings;
+        m_settings = nullptr;
         return false;
+    }
     state = value.toBool();
     m_settings->remove("lan_switch_opened");
     delete m_settings;
+    m_settings = nullptr;
     return true;
 }
diff --git a/src/frontend/tab-pages/tabpage.h b/src/frontend/tab-pages/tabpage.h
index 5bdd8d25..97a981df 100644
--- a/src/frontend/tab-pages/tabpage.h
+++ b/src/frontend/tab-pages/tabpage.h
@@ -81,7 +81,7 @@ bool checkDeviceExist(KyDeviceType deviceType, QString deviceName);
 QString getDefaultDeviceName(KyDeviceType deviceType);
 void setDefaultDevice(KyDeviceType deviceType, QString deviceName);
 void getDeviceEnableState(int type, QMap<QString, bool> &map);
-bool getOldWiredSwitchState(bool state);
+bool getOldVersionWiredSwitchState(bool state);
 
 class TabPage : public QWidget
 {