diff --git a/include/dbStructureView.h b/include/dbStructureView.h
index d6b6619..0cbc42a 100644
--- a/include/dbStructureView.h
+++ b/include/dbStructureView.h
@@ -42,7 +42,7 @@ signals:
     void actionTrigger_addGroup(int);
     void openAttributeInfo(const QString&, ModelAttributeGroup&);
     void closeAttributeInfo(ModelAttributeGroup&);
-    void closeAllAttributeInfo();
+    void disconnect();
 
 private slots:
     void itemDoubleClick(const QModelIndex&);
diff --git a/include/mainwindow.h b/include/mainwindow.h
index f383cac..9201113 100644
--- a/include/mainwindow.h
+++ b/include/mainwindow.h
@@ -68,7 +68,7 @@ private slots:
     //void onSIG_addAttributes();
     void onSIG_openAttributeInfo(const QString&, ModelAttributeGroup&);
     void onSIG_closeAttributeInfo(ModelAttributeGroup&);
-    void onSIG_closeAllAttributeInfo();
+    void onSIG_disconnect();
     void onSIG_openAttributeSelector();
 };
 
diff --git a/source/dbStructureView.cpp b/source/dbStructureView.cpp
index 2895cd1..f9cddc3 100644
--- a/source/dbStructureView.cpp
+++ b/source/dbStructureView.cpp
@@ -91,7 +91,7 @@ void DBStructureView::disconnectToDB(const QString& connName)
         if(index.isValid())
             collapse(index);
 
-        emit closeAllAttributeInfo();
+        emit disconnect();
     }
 }
 
diff --git a/source/mainwindow.cpp b/source/mainwindow.cpp
index 86827b7..2195cb1 100644
--- a/source/mainwindow.cpp
+++ b/source/mainwindow.cpp
@@ -86,7 +86,7 @@ void MainWindow::initialize()
     connect(m_pDBStrutureView, &DBStructureView::actionTrigger_addGroup, this, &MainWindow::onActionTrigger_addGroup);
     connect(m_pDBStrutureView, &DBStructureView::openAttributeInfo, this, &MainWindow::onSIG_openAttributeInfo);
     connect(m_pDBStrutureView, &DBStructureView::closeAttributeInfo, this, &MainWindow::onSIG_closeAttributeInfo);
-    connect(m_pDBStrutureView, &DBStructureView::closeAllAttributeInfo, this, &MainWindow::onSIG_closeAllAttributeInfo);
+    connect(m_pDBStrutureView, &DBStructureView::disconnect, this, &MainWindow::onSIG_disconnect);
     ui->layoutDBStructure->addWidget(m_pDBStrutureView);
     m_pDBStrutureModel = new DBStructureModel(this);
     m_pDBStrutureModel->setMainWindow(this);
@@ -321,10 +321,17 @@ void MainWindow::onSIG_closeAttributeInfo(ModelAttributeGroup& attributeGroup)
         m_dbBrowser->closeTab_attribute(attributeGroup);
 }
 
-void MainWindow::onSIG_closeAllAttributeInfo()
+void MainWindow::onSIG_disconnect()
 {
     if(m_dbBrowser)
         m_dbBrowser->closeAllTab_attribute();
+
+    if(m_pAttributeSelector)
+    {
+        m_pAttributeSelector->setParent(nullptr);
+        delete m_pAttributeSelector;
+        m_pAttributeSelector = nullptr;
+    }
 }
 
 void MainWindow::onSIG_openAttributeSelector()