diff --git a/designer-base/src/main/java/com/fr/design/notification/NotificationCenter.java b/designer-base/src/main/java/com/fr/design/notification/NotificationCenter.java
index 7ca868db5..3faadf795 100644
--- a/designer-base/src/main/java/com/fr/design/notification/NotificationCenter.java
+++ b/designer-base/src/main/java/com/fr/design/notification/NotificationCenter.java
@@ -26,12 +26,12 @@ public class NotificationCenter {
     }
 
     public void removeNotification(int index){
-         notifications.remove(index);
-         NotificationCenterPane.getNotificationCenterPane().refreshButton();
+        notifications.remove(index);
+        NotificationCenterPane.getNotificationCenterPane().refreshButton();
     }
 
     public Notification getNotification(int index){
-       return notifications.get(index);
+        return notifications.get(index);
     }
 
     public void clearAllNotifications(){
diff --git a/designer-base/src/main/java/com/fr/design/notification/ui/NotificationCenterDialog.java b/designer-base/src/main/java/com/fr/design/notification/ui/NotificationCenterDialog.java
index 62b2f9d69..10e10ecdb 100644
--- a/designer-base/src/main/java/com/fr/design/notification/ui/NotificationCenterDialog.java
+++ b/designer-base/src/main/java/com/fr/design/notification/ui/NotificationCenterDialog.java
@@ -2,7 +2,6 @@ package com.fr.design.notification.ui;
 
 import com.fr.design.gui.ilable.UILabel;
 import com.fr.design.layout.FRGUIPaneFactory;
-import com.fr.design.mainframe.DesignerContext;
 import com.fr.design.notification.Notification;
 import com.fr.design.notification.NotificationCenter;
 import java.awt.BorderLayout;
@@ -26,9 +25,8 @@ public class NotificationCenterDialog extends JDialog {
     private UILabel deleteLabel;
     private static final int NOTIFICATIONCOUNT = 5;
 
-    private static NotificationCenterDialog instance;
 
-    private NotificationCenterDialog(Frame parent) {
+    public NotificationCenterDialog(Frame parent) {
         super(parent);
         setTitle(com.fr.design.i18n.Toolkit.i18nText("Fine-Design_Basic_Notification"));
         setResizable(false);
@@ -42,13 +40,6 @@ public class NotificationCenterDialog extends JDialog {
         initComponents();
     }
 
-    public static NotificationCenterDialog getInstance() {
-        if (instance == null) {
-            instance = new NotificationCenterDialog(DesignerContext.getDesignerFrame());
-        }
-        return instance;
-    }
-
     private void initComponents() {
         centerPanel = FRGUIPaneFactory.createNColumnGridInnerContainer_S_Pane(1);
         addNotification();
@@ -89,14 +80,15 @@ public class NotificationCenterDialog extends JDialog {
         return deleteLabel;
     }
 
-    public void showDialog() {
-        this.setVisible(true);
-    }
 
     public void hideDialog() {
         this.dispose();
     }
 
+    public void showDialog() {
+       this.setVisible(true);
+    }
+
     public void addNotification() {
         notificationNeedShow.clear();
 
diff --git a/designer-base/src/main/java/com/fr/design/notification/ui/NotificationCenterPane.java b/designer-base/src/main/java/com/fr/design/notification/ui/NotificationCenterPane.java
index dfc89cce2..3ec5a53a9 100644
--- a/designer-base/src/main/java/com/fr/design/notification/ui/NotificationCenterPane.java
+++ b/designer-base/src/main/java/com/fr/design/notification/ui/NotificationCenterPane.java
@@ -4,6 +4,7 @@ import com.fr.design.constants.UIConstants;
 import com.fr.design.dialog.BasicPane;
 import com.fr.design.gui.ibutton.UIButton;
 import com.fr.design.i18n.Toolkit;
+import com.fr.design.mainframe.DesignerContext;
 import com.fr.design.notification.NotificationCenter;
 import com.fr.general.IOUtils;
 import java.awt.BorderLayout;
@@ -27,7 +28,8 @@ public class NotificationCenterPane extends BasicPane {
         notificationCenterButton.addMouseListener(new MouseAdapter() {
             @Override
             public void mouseClicked(MouseEvent e) {
-                NotificationCenterDialog.getInstance().showDialog();
+                NotificationCenterDialog notificationCenterDialog = new NotificationCenterDialog(DesignerContext.getDesignerFrame());
+                notificationCenterDialog.showDialog();
             }
         });
         this.setBackground(UIConstants.TEMPLATE_TAB_PANE_BACKGROUND);