diff --git a/src/UI/WPF/ViewModels/LayerManagementViewModel.cs b/src/UI/WPF/ViewModels/LayerManagementViewModel.cs
index 2f977da..15aad49 100644
--- a/src/UI/WPF/ViewModels/LayerManagementViewModel.cs
+++ b/src/UI/WPF/ViewModels/LayerManagementViewModel.cs
@@ -1948,8 +1948,11 @@ namespace NavisworksTransport.UI.WPF.ViewModels
 
                 // 委托给业务层：验证剖面盒 → 遍历模型树 → 导出
                 CurrentOperationText = "正在查找剖面盒内的对象...";
-                var exporter = new SectionBoxExporter();
-                var result = exporter.ExportSectionBoxFromActiveView(document, saveFilePath);
+                var result = await Task.Run(() =>
+                {
+                    var exporter = new SectionBoxExporter();
+                    return exporter.ExportSectionBoxFromActiveView(document, saveFilePath);
+                });
 
                 if (result.Success)
                 {