diff --git a/designer_base/src/com/fr/design/gui/icontainer/UIEastResizableContainer.java b/designer_base/src/com/fr/design/gui/icontainer/UIEastResizableContainer.java
index 85e11d8d7..19390a784 100644
--- a/designer_base/src/com/fr/design/gui/icontainer/UIEastResizableContainer.java
+++ b/designer_base/src/com/fr/design/gui/icontainer/UIEastResizableContainer.java
@@ -132,7 +132,10 @@ public class UIEastResizableContainer extends JPanel {
      * @param containerWidth
      */
     public void setLastContainerWidth(int containerWidth) {
-        this.containerWidth = containerWidth;
+        if (containerWidth == leftPaneWidth) {
+            this.containerWidth = containerWidth;
+        }
+        // 忽略其他情况
     }
 
     private LayoutManager containerLayout = new LayoutManager() {
diff --git a/designer_base/src/com/fr/design/mainframe/EastRegionContainerPane.java b/designer_base/src/com/fr/design/mainframe/EastRegionContainerPane.java
index 7f96747d5..2027c4483 100644
--- a/designer_base/src/com/fr/design/mainframe/EastRegionContainerPane.java
+++ b/designer_base/src/com/fr/design/mainframe/EastRegionContainerPane.java
@@ -28,7 +28,7 @@ public class EastRegionContainerPane extends UIEastResizableContainer {
     private JPanel leftPane;
     private JPanel rightPane;
     private FixedPopupPane currentPopupPane;
-    private static final int CONTAINER_WIDTH = 260;
+    private static final int CONTAINER_WIDTH = 290;
     private static final int TAB_WIDTH = 40;
     private static final int CONTENT_WIDTH = CONTAINER_WIDTH - TAB_WIDTH;
     private static final int POPUP_TOOLPANE_HEIGHT = 25;