diff --git a/event_smart/src/main/java/com/njcn/gather/event/transientes/service/impl/LargeScreenCountServiceImpl.java b/event_smart/src/main/java/com/njcn/gather/event/transientes/service/impl/LargeScreenCountServiceImpl.java
index dd39f64f..56836390 100644
--- a/event_smart/src/main/java/com/njcn/gather/event/transientes/service/impl/LargeScreenCountServiceImpl.java
+++ b/event_smart/src/main/java/com/njcn/gather/event/transientes/service/impl/LargeScreenCountServiceImpl.java
@@ -650,6 +650,9 @@ public class LargeScreenCountServiceImpl implements LargeScreenCountService {
 
     private List<EventDetailVO> change(List<PqsEventdetail> list){
         List<EventDetailVO> result = new ArrayList<>();
+        if(CollectionUtils.isEmpty(list)){
+            return result;
+        }
         List<Integer> lineidList = list.stream().map(PqsEventdetail::getLineid).collect(Collectors.toList());
 
         List<LedgerBaseInfoDTO> pqLineList = pqLineMapper.getBaseLineInfo(lineidList);