diff --git a/designer-chart/src/main/java/com/fr/van/chart/designer/style/axis/VanChartTimeAxisPane.java b/designer-chart/src/main/java/com/fr/van/chart/designer/style/axis/VanChartTimeAxisPane.java
index 212e8b1fa..69a326ac4 100644
--- a/designer-chart/src/main/java/com/fr/van/chart/designer/style/axis/VanChartTimeAxisPane.java
+++ b/designer-chart/src/main/java/com/fr/van/chart/designer/style/axis/VanChartTimeAxisPane.java
@@ -162,8 +162,10 @@ public class VanChartTimeAxisPane extends VanChartBaseAxisPane {
 
             JPanel mainTickPane = new JPanel();
             mainTickPane.setLayout(new FlowLayout(FlowLayout.LEFT, 0, 0));
-            mainUnitField.setPreferredSize(new Dimension(80,20));
-            secondUnitField.setPreferredSize(new Dimension(80,20));
+
+            int width = TableLayout4VanChartHelper.SECOND_EDIT_AREA_WIDTH - (int) Math.ceil(mainType.getPreferredSize().getWidth());
+            mainUnitField.setPreferredSize(new Dimension(width,20));
+            secondUnitField.setPreferredSize(new Dimension(width,20));
             mainTickPane.add(mainUnitField);
             mainTickPane.add(mainType);