diff --git a/src/CAD/IFox.CAD.Shared/ExtensionMethod/Entity/EntityEx.cs b/src/CAD/IFox.CAD.Shared/ExtensionMethod/Entity/EntityEx.cs
index c3a283421301219d47197e6d25c289d3e3111731..fb077552defce431a152bed444668e13cb1965e8 100644
--- a/src/CAD/IFox.CAD.Shared/ExtensionMethod/Entity/EntityEx.cs
+++ b/src/CAD/IFox.CAD.Shared/ExtensionMethod/Entity/EntityEx.cs
@@ -130,12 +130,16 @@ public static void Mirror(this Entity ent, Point3d basePoint)
     public static Extents3d GetExtents(this IEnumerable<Entity> ents)
     {
         var ext = new Extents3d();
+        var pm = new ProgressManager("获取包围盒中...");
+        pm.SetTotalOperations(ents.Count());
         foreach (var item in ents)
         {
-          var e = item.GetBoundingBoxEx();
+            pm.Updated();
+            var e = item.GetBoundingBoxEx();
             if (e.HasValue)
                 ext.AddExtents(e.Value.Extents3d);
         }
+        pm.Dispose();
         return ext;
     }
     #endregion