diff --git a/designer-base/src/main/java/com/fr/design/data/tabledata/tabledatapane/MaxMemRowCountPanel.java b/designer-base/src/main/java/com/fr/design/data/tabledata/tabledatapane/MaxMemRowCountPanel.java
index 3f5902d8a4..bb8f3128ba 100644
--- a/designer-base/src/main/java/com/fr/design/data/tabledata/tabledatapane/MaxMemRowCountPanel.java
+++ b/designer-base/src/main/java/com/fr/design/data/tabledata/tabledatapane/MaxMemRowCountPanel.java
@@ -21,7 +21,7 @@ public class MaxMemRowCountPanel extends UIToolbar {
 	private static final String[] CACHE_LIST = {com.fr.design.i18n.Toolkit.i18nText("Fine-Design_Basic_Save_All_Records_In_Memory"),
 												com.fr.design.i18n.Toolkit.i18nText("Fine-Design_Basic_Max_Mem_Row_Count") };
 	private static final int MAX_WIDTH = getMaxComBoBoxWidth() > 200 ? 350 : 250;
-
+	private static final int MAX_COMPONENT_COUNT_OF_MAX_MEMORY = 4;
 	private static int getMaxComBoBoxWidth() {
 		int maxWidth = GraphHelper.getWidth(CACHE_LIST[0]);
 		for (int i = 1; i < CACHE_LIST.length; i++) {
@@ -88,7 +88,8 @@ public class MaxMemRowCountPanel extends UIToolbar {
 		this.removeAll();
 		this.add(switchCache);
 		switchCache.setSelectedIndex(MAX_IN_MEMORY);
-		if (this.getComponentCount() == 4) {
+		if (this.getComponentCount() == MAX_COMPONENT_COUNT_OF_MAX_MEMORY) {
+			//此处因为switchCache的setSelectedIndex可能会造成双层调用，然后因为重复添加组件产生bug，故而定义这个工具栏的正常最大组件数，做个判断
 			return;
 		}
 		this.add(new UILabel(" "));