diff --git a/src/budget/_mw.py b/src/budget/_mw.py
index 5d4588b..decfc6a 100644
--- a/src/budget/_mw.py
+++ b/src/budget/_mw.py
@@ -2,6 +2,7 @@ from PyQt6.QtWidgets import *
 from ._pg import PostgresTab
 from ._category import CategoryTab
 from ._pg import PostgresTab
+from ._account import AccountTab
 
 def initUI(self):
 
@@ -10,11 +11,13 @@ def initUI(self):
 
     self.pg = PostgresTab()
     self.categoryTab = CategoryTab(self)
+    self.accountTab = AccountTab(self)
 
     # 创建主窗口tab布局
     mainWidget = QTabWidget()
     mainWidget.addTab(self.pg, 'Connect')
     mainWidget.addTab(self.categoryTab, 'Category')
+    mainWidget.addTab(self.accountTab, 'Account')
 
     mainWidget.currentChanged.connect(self.onTabChanged)
 
@@ -23,5 +26,5 @@ def initUI(self):
     self.pg.onConnectClicked()
 
 def onTabChanged(self, index):
-    if (index == 1):
         self.centralWidget().widget(index).selected()
+    
diff --git a/src/budget/_pg.py b/src/budget/_pg.py
index dfe5bc4..75cf7d2 100644
--- a/src/budget/_pg.py
+++ b/src/budget/_pg.py
@@ -3,12 +3,19 @@ import psycopg2
 from ._tab import TabPage
 
 class PostgresTab(TabPage):
+
+    cur = None
+    conn = None
+
     def __init__(self):
         super().__init__()
         self.initUI()
 
-    cur = None
-    conn = None
+    # 退出时断开数据库连接
+    def __del__(self):
+        if(self.connected()):
+            self.disconnectFromDatabase()
+
 
     def connected(self):
         return self.cur is not None