diff --git a/src/views/eam/device/devicemaintenancejob/index.vue b/src/views/eam/device/devicemaintenancejob/index.vue
index 33c352f..227fd29 100644
--- a/src/views/eam/device/devicemaintenancejob/index.vue
+++ b/src/views/eam/device/devicemaintenancejob/index.vue
@@ -734,7 +734,7 @@ const buttonTableClick = async (val, row) => {
 
 const openForm = async (type: string, row?: any) => {
   if(type == 'update'){
-   row.classes = String(row.classes)
+   row.classes = String(row.classes?row.classes:'')
   }
   tableData.value = [] // 重置明细数据
   await DeviceAccountsApi.getDeviceAccountsNoPage({}).then(res => {