diff --git a/src/IFoxCAD.Cad/ExtensionMethod/PointEx.cs b/src/IFoxCAD.Cad/ExtensionMethod/PointEx.cs
index c534be66a5897f288dc64ff8b86692fac4844813..d81a0f26ee0a88c6663cadb971db8ce55f4e7c66 100644
--- a/src/IFoxCAD.Cad/ExtensionMethod/PointEx.cs
+++ b/src/IFoxCAD.Cad/ExtensionMethod/PointEx.cs
@@ -42,5 +42,34 @@ public static double GetAngle(this Point2d startPoint, Point2d endPoint)
         return startPoint.GetVectorTo(endPoint).Angle;
     }
 
+    /// <summary>
+    /// 按对称轴镜像Point
+    /// </summary>
+    /// <param name="point">Point</param>
+    /// <param name="startPoint">对称轴起点</param>
+    /// <param name="endPoint">对称轴终点</param>
+    public static Point3d Mirror(this Point3d point, Point3d startPoint, Point3d endPoint)
+    {
+        return point.TransformBy(Matrix3d.Mirroring(new Line3d(startPoint, endPoint)));
+    }
 
+    /// <summary>
+    /// 按对称面镜像Point
+    /// </summary>
+    /// <param name="point">Point</param>
+    /// <param name="plane">对称平面</param>
+    public static Point3d Mirror(this Point3d point, Plane plane)
+    {
+        return point.TransformBy(Matrix3d.Mirroring(plane));
+    }
+
+    /// <summary>
+    /// 按对称点镜像Point
+    /// </summary>
+    /// <param name="point">Point</param>
+    /// <param name="basePoint">对称点</param>
+    public static Point3d Mirror(this Point3d point, Point3d basePoint)
+    {
+        return point.TransformBy(Matrix3d.Mirroring(basePoint));
+    }
 }
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