diff --git a/Bin/net40/SunnyUI.Demo.exe b/Bin/net40/SunnyUI.Demo.exe
index 358ab9bb..85c57d2e 100644
Binary files a/Bin/net40/SunnyUI.Demo.exe and b/Bin/net40/SunnyUI.Demo.exe differ
diff --git a/Bin/net40/SunnyUI.dll b/Bin/net40/SunnyUI.dll
index e75a3593..9e739d92 100644
Binary files a/Bin/net40/SunnyUI.dll and b/Bin/net40/SunnyUI.dll differ
diff --git a/SunnyUI.Demo/Charts/FBarChart.cs b/SunnyUI.Demo/Charts/FBarChart.cs
index 30445ac0..4376ba08 100644
--- a/SunnyUI.Demo/Charts/FBarChart.cs
+++ b/SunnyUI.Demo/Charts/FBarChart.cs
@@ -51,17 +51,19 @@ namespace Sunny.UI.Demo
 
             option.XAxis.Data.Add("D1");
             option.XAxis.Data.Add("D2");
-            option.XAxis.Data.Add("D3");
+            option.XAxis.Data.Add("D223");
             option.XAxis.Data.Add("D4");
             option.XAxis.Data.Add("D5");
             option.XAxis.Data.Add("D6");
-            option.XAxis.Data.Add("D7");
+            option.XAxis.Data.Add("D7333");
             option.XAxis.Data.Add("D8");
 
             option.ToolTip.Visible = true;
             option.YAxis.Scale = true;
 
             option.XAxis.Name = "日期";
+            option.XAxis.AxisLabel.Angle = 60;//(0° ~ 90°)
+
             option.YAxis.Name = "数值";
             option.YAxis.AxisLabel.DecimalCount = 1;
             option.YAxis.AxisLabel.AutoFormat = false;
diff --git a/SunnyUI/Charts/UIBarChart.cs b/SunnyUI/Charts/UIBarChart.cs
index 4c8ca4b0..7aa5e31d 100644
--- a/SunnyUI/Charts/UIBarChart.cs
+++ b/SunnyUI/Charts/UIBarChart.cs
@@ -20,6 +20,7 @@
  * 2020-08-21: V2.2.7 可设置柱状图最小宽度
  * 2021-07-22: V3.0.5 增加更新数据的方法
  * 2021-01-01: V3.0.9 增加柱子上显示数值
+ * 2022-03-08: V3.1.1 增加X轴文字倾斜
 ******************************************************************************/
 
 using System;
@@ -500,8 +501,12 @@ namespace Sunny.UI
                 foreach (var data in Option.XAxis.Data)
                 {
                     SizeF sf = g.MeasureString(data, TempFont);
-                    g.DrawString(data, TempFont, ForeColor, start - sf.Width / 2.0f, DrawOrigin.Y + Option.XAxis.AxisTick.Length);
-                    start += DrawBarWidth;
+                    int angle = (Option.XAxis.AxisLabel.Angle + 36000) % 360;
+                    if (angle > 0 && angle <= 90)
+                        g.DrawString(data, TempFont, ForeColor, new PointF(start, DrawOrigin.Y),
+                            new StringFormat() { Alignment = StringAlignment.Far }, (3600 - Option.XAxis.AxisLabel.Angle) % 360);
+                    else
+                        g.DrawString(data, TempFont, ForeColor, start - sf.Width / 2.0f, DrawOrigin.Y + Option.XAxis.AxisTick.Length); start += DrawBarWidth;
                 }
 
                 SizeF sfname = g.MeasureString(Option.XAxis.Name, TempFont);