diff --git a/src/views/abnormalAlarm/analysisMonitor/alarmRules/index.vue b/src/views/abnormalAlarm/analysisMonitor/alarmRules/index.vue
index 087f29d..9116afa 100644
--- a/src/views/abnormalAlarm/analysisMonitor/alarmRules/index.vue
+++ b/src/views/abnormalAlarm/analysisMonitor/alarmRules/index.vue
@@ -590,7 +590,7 @@ export default {
             colTime: colTime ? (colTime.length > 1 ? colTime : colTime[0]) : null,
             xe133MDC: xe133MDC ? (xe133MDC.length > 1 ? xe133MDC : xe133MDC[0]) : null,
 
-            identifyNuclides: identifyNuclidesChecked || null,
+            identifyNuclides: identifyNuclidesChecked || undefined,
             station: stationChecked,
             nuclide: nuclidesChecked,