diff --git a/laws-module-system/src/main/java/com/jero/modules/system/service/impl/SysUserDepartServiceImpl.java b/laws-module-system/src/main/java/com/jero/modules/system/service/impl/SysUserDepartServiceImpl.java
index b490db9c..18167205 100644
--- a/laws-module-system/src/main/java/com/jero/modules/system/service/impl/SysUserDepartServiceImpl.java
+++ b/laws-module-system/src/main/java/com/jero/modules/system/service/impl/SysUserDepartServiceImpl.java
@@ -157,6 +157,9 @@ public class SysUserDepartServiceImpl extends ServiceImpl<SysUserDepartMapper, S
 	public String getFirstDeptIdByUserId(String userId) {
 		List<DepartIdModel> departIdModels = this.queryDepartIdsOfUser(userId);
 		List<String> departIds = departIdModels.stream().map(DepartIdModel::getKey).collect(Collectors.toList());
-		return departIds.get(0);
+		if (!departIds.isEmpty()) {
+			return departIds.get(0);
+		}
+		return null;
 	}
 }