diff --git a/dolphinscheduler-ui-next/src/views/projects/workflow/definition/components/start-modal.tsx b/dolphinscheduler-ui-next/src/views/projects/workflow/definition/components/start-modal.tsx
index b7b91df03..7cfe800af 100644
--- a/dolphinscheduler-ui-next/src/views/projects/workflow/definition/components/start-modal.tsx
+++ b/dolphinscheduler-ui-next/src/views/projects/workflow/definition/components/start-modal.tsx
@@ -363,6 +363,7 @@ export default defineComponent({
                     type='datetimerange'
                     clearable
                     v-model:value={this.startForm.startEndTime}
+                    placement='top'
                   />
                 </NFormItem>
               </NSpace>