diff --git a/designer-realize/src/main/java/com/fr/poly/creator/PolyElementCasePane.java b/designer-realize/src/main/java/com/fr/poly/creator/PolyElementCasePane.java
index af6918de2..cf93aa74a 100644
--- a/designer-realize/src/main/java/com/fr/poly/creator/PolyElementCasePane.java
+++ b/designer-realize/src/main/java/com/fr/poly/creator/PolyElementCasePane.java
@@ -13,12 +13,18 @@ import com.fr.report.poly.PolyECBlock;
  */
 public abstract class PolyElementCasePane extends ElementCasePane<PolyECBlock> {
 
+	/**
+	 * 水平方向在一个屏幕内可见的可扩展的列数
+	 */
+	private static final int HORIZONTAL_EXTENT_VALUE = 200;
+
 	public PolyElementCasePane(PolyECBlock block) {
 		super(block);
         setSelection(new CellSelection(0, 0, 1, 1));
         // 都不加这两个组件，当然他们也就没可见性了
 		setHorizontalScrollBarVisible(false);
 		setVerticalScrollBarVisible(false);
+		this.getGrid().setHorizontalExtent(HORIZONTAL_EXTENT_VALUE);
 	}
 
     @Override