diff --git a/SunnyUI/Controls/UIComboDataGridView.cs b/SunnyUI/Controls/UIComboDataGridView.cs
index d77c1d1a..1325127a 100644
--- a/SunnyUI/Controls/UIComboDataGridView.cs
+++ b/SunnyUI/Controls/UIComboDataGridView.cs
@@ -20,6 +20,7 @@
  * 2021-11-05: V3.0.8 增加过滤
  * 2022-03-22: V3.1.1 增加自动过滤、单元格双击选中
  * 2022-04-16: V3.1.3 增加行多选
+ * 2022-06-16: V3.2.0 增加下拉框宽度
 ******************************************************************************/
 
 using System;
@@ -46,8 +47,14 @@ namespace Sunny.UI
             this.ButtonClick += UIComboDataGridView_ButtonClick;
             this.ResumeLayout(false);
             this.PerformLayout();
+
+            DropDownWidth = 333;
         }
 
+        [DefaultValue(333)]
+        [Description("下拉框宽度"), Category("SunnyUI")]
+        public int DropDownWidth { get; set; }
+
         private void UIComboDataGridView_ButtonClick(object sender, EventArgs e)
         {
             item.FilterColumnName = FilterColumnName;
@@ -56,7 +63,8 @@ namespace Sunny.UI
             item.ShowButtons = true;
             item.SetDPIScale();
             item.Translate();
-            ItemForm.Show(this);
+            //ItemForm.Show(this);
+            ItemForm.Show(this, new Size(DropDownWidth < Width ? Width : DropDownWidth, CalcItemFormHeight()));
         }
 
         [DefaultValue(typeof(Size), "320, 240"), Description("下拉弹框界面大小"), Category("SunnyUI")]