diff --git a/IRaCIS.Core.Application/Helper/FileDocProcess/ExcelExportHelper.cs b/IRaCIS.Core.Application/Helper/FileDocProcess/ExcelExportHelper.cs
index 01989e6b7..68ca83452 100644
--- a/IRaCIS.Core.Application/Helper/FileDocProcess/ExcelExportHelper.cs
+++ b/IRaCIS.Core.Application/Helper/FileDocProcess/ExcelExportHelper.cs
@@ -165,7 +165,7 @@ public static class ExcelExportHelper
             }
 
             //中文替换项目术语
-            if (data.TrialObjectNameList.Count > 0)
+            if (data.TrialObjectNameList?.Count > 0)
             {
                 var replaceObjectList = data.TrialObjectNameList;