diff --git a/IRaCIS.Core.Application/Helper/FileDocProcess/ExcelExportHelper.cs b/IRaCIS.Core.Application/Helper/FileDocProcess/ExcelExportHelper.cs
index bb06c55a6..12d0b97f1 100644
--- a/IRaCIS.Core.Application/Helper/FileDocProcess/ExcelExportHelper.cs
+++ b/IRaCIS.Core.Application/Helper/FileDocProcess/ExcelExportHelper.cs
@@ -166,7 +166,7 @@ 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;