diff --git a/src/pages/examination/index.vue b/src/pages/examination/index.vue
index 7a2065eb..257c7cdd 100644
--- a/src/pages/examination/index.vue
+++ b/src/pages/examination/index.vue
@@ -325,7 +325,7 @@
 		}
 		// 记录起始时间
 		examinationStartTime = new Date().getTime();
-		paperData.crsId = examination.crsId;
+		paperData.crsId = examination.crsId ?? '';
 		paperData.execId = examination.execId;
 		paperData.examId = examination.examId;
 		paperData.papersId = examination.papersId;