diff --git a/ExportModule/ViewModels/ExportViewModel.cs b/ExportModule/ViewModels/ExportViewModel.cs
index 10524d8..730beba 100644
--- a/ExportModule/ViewModels/ExportViewModel.cs
+++ b/ExportModule/ViewModels/ExportViewModel.cs
@@ -69,6 +69,13 @@ namespace ExportModule.ViewModels
             get => _totalCount;
             set => SetProperty(ref _totalCount, value);
         }
+
+        private TestReportModel? _selectedTestReport;
+        public TestReportModel? SelectedTestReport
+        {
+            get => _selectedTestReport;
+            set => SetProperty(ref _selectedTestReport, value);
+        }
         #endregion
 
         #region 命令
@@ -144,24 +151,21 @@ namespace ExportModule.ViewModels
         }
 
         /// <summary>
-        /// 导出 Excel（根据当前筛选条件导出完整实体数据）
+        /// 导出 Excel：根据用户在表格中选中的 TestReportModel.TestRoundId 查询并导出完整步骤数据
         /// </summary>
         private async Task OnExport()
         {
-            DateTime? queryEnd = EndTime;
-            if (queryEnd.HasValue)
+            if (SelectedTestReport == null)
             {
-                queryEnd = queryEnd.Value.Date.AddDays(1).AddSeconds(-1);
+                ShowErrorMessageBox("请先在列表中选择一条测试记录。", () => { });
+                return;
             }
 
-            string? scope = SelectedScope == "全部" ? null : SelectedScope;
-
-            // 查询全量实体数据
             StatusMessage = "正在查询导出数据...";
-            var entityResult = await _testReportService.GetEntitiesByFilter(StartTime, queryEnd, scope);
+            var entityResult = await _testReportService.GetByTestRoundIdAsync(SelectedTestReport.TestRoundId);
             if (!entityResult.IsSuccess || entityResult.Data == null || entityResult.Data.Count == 0)
             {
-                ShowErrorMessageBox("没有数据可导出，请先查询或调整筛选条件。", () => { });
+                ShowErrorMessageBox("未找到该测试记录的详细步骤数据。", () => { });
                 return;
             }
 
@@ -169,15 +173,15 @@ namespace ExportModule.ViewModels
             {
                 Filter = "Excel 工作簿 (*.xlsx)|*.xlsx|所有文件 (*.*)|*.*",
                 DefaultExt = ".xlsx",
-                FileName = $"测试报告_{DateTime.Now:yyyyMMdd_HHmmss}.xlsx"
+                FileName = $"测试报告_{SelectedTestReport.Scope}_{SelectedTestReport.StartTime:yyyyMMdd_HHmmss}.xlsx"
             };
 
             if (dialog.ShowDialog() != true) return;
 
             var entities = entityResult.Data;
-            StatusMessage = $"正在导出 {entities.Count} 条记录...";
+            StatusMessage = $"正在导出 {entities.Count} 条步骤记录...";
             await Task.Run(() => ExportToExcel(dialog.FileName, entities));
-            ShowInfoMessageBox($"导出完成，共 {entities.Count} 条记录，已保存至：{dialog.FileName}", () => { });
+            ShowInfoMessageBox($"导出完成，共 {entities.Count} 条步骤记录，已保存至：{dialog.FileName}", () => { });
         }
 
         #endregion
diff --git a/ExportModule/Views/ExportView.xaml b/ExportModule/Views/ExportView.xaml
index 023fcd6..ce5ac3a 100644
--- a/ExportModule/Views/ExportView.xaml
+++ b/ExportModule/Views/ExportView.xaml
@@ -135,6 +135,7 @@
                               Background="White"
                               AlternatingRowBackground="#F5F7FA"
                               SelectionMode="Single"
+                              SelectedItem="{Binding SelectedTestReport}"
                               Margin="8">
                         <DataGrid.Columns>
                             <DataGridTextColumn Header="TestRoundId"