diff --git a/UI/MainWindow.py b/UI/MainWindow.py
index b7238aa..413d7a1 100644
--- a/UI/MainWindow.py
+++ b/UI/MainWindow.py
@@ -30,7 +30,7 @@ class MainWindow(QMainWindow):
         super().__init__()
 
 
-        self.sub_windows = [] #存储设备widget
+        self.subWindows = [] #存储设备widget
         self.nowValue = [] #储存当前值
         self.areaLabel = [] #存储通道信息文本
         self.areaDict = {}
@@ -52,11 +52,12 @@ class MainWindow(QMainWindow):
         self.startProtocolBtn.setObjectName("startProtocolBtn")
         self.startProtocolBtn.triggered.connect(self.startProtocol)
 
-        # self.loadProjectBtn = QAction('导入工程', self)
-        # self.loadProjectBtn.setObjectName("loadProjectBtn")
-        # self.loadProjectBtn.triggered.connect(self.loadProject)
+        self.loadProjectBtn = QAction('导入工程', self)
+        self.loadProjectBtn.setObjectName("loadProjectBtn")
+        self.loadProjectBtn.triggered.connect(self.loadProject)
 
         self.toolbar.addAction(self.addDiviceBtn)
+        self.toolbar.addAction(self.loadProjectBtn)
         self.toolbar.addAction(self.startProtocolBtn)
 
         self.mdi_area = QMdiArea()
@@ -78,7 +79,7 @@ class MainWindow(QMainWindow):
 
 
     def deviceWidget(self, windowTitle):
-        sub_window = AreaQMdiSubWindow()# 创建一个子窗口
+        sub_window = AreaQMdiSubWindow(self)# 创建一个子窗口
         sub_window.setObjectName('sub_window')
         areaLayout1 = QGridLayout()
         areaLayout2 = QGridLayout()
@@ -126,10 +127,12 @@ class MainWindow(QMainWindow):
 
 
         sub_window.show()
-        self.sub_windows.append(sub_window)
+        self.subWindows.append(sub_window)
 
 
         return sub_window
+    def loadProject(self):
+        pass
 
     def initAreaWidget(self):
         alldevices = DevicesManange().getAllDevice()
@@ -329,7 +332,7 @@ class MainWindow(QMainWindow):
         #     if btn in item:
         #         item[4].setText(item[5].text())
     def writeValue(self):
-        for deviceNames in self.sub_windows:
+        for deviceNames in self.subWindows:
             deviceName = deviceNames.windowTitle()
             areas = [[1,2,3,4,5],[2,3,4,5]]
             for area in areas:
@@ -348,20 +351,16 @@ class MainWindow(QMainWindow):
         print(a)
 
 
-    def closeEvent(self, event):
-        pass
-
-
-    def deleteAreaWidget(self):
-        pass
-
 
 
 class AreaQMdiSubWindow(QMdiSubWindow):
-    def __init__(self):
+    def __init__(self, parentWindow):
         super().__init__()
-        self.number = 0
+        self.parentWindow = parentWindow
     def closeEvent(self, event):
+        print(self.parentWindow.subWindows)
+        self.parentWindow.subWindows.remove(self)
+        print(self.parentWindow.subWindows)
         DeviceDB.deleteDevice(deviceName = self.windowTitle())
 
 
@@ -370,6 +369,7 @@ class AreaQMdiSubWindow(QMdiSubWindow):
 
 
 
+
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     Client.initDB()