diff --git a/apps/web-antd/src/views/aiot/device/roi/components/WorkingHoursEditor.vue b/apps/web-antd/src/views/aiot/device/roi/components/WorkingHoursEditor.vue
index 6885fe0cf..1149e78ac 100644
--- a/apps/web-antd/src/views/aiot/device/roi/components/WorkingHoursEditor.vue
+++ b/apps/web-antd/src/views/aiot/device/roi/components/WorkingHoursEditor.vue
@@ -233,7 +233,7 @@ function getDuration(period: WorkingHourPeriod): string {
           v-model:value="currentRange"
           format="HH:mm"
           :minute-step="30"
-          placeholder="["开始时间", "结束时间"]"
+          :placeholder="['开始时间', '结束时间']"
           style="flex: 1"
         />
         <Button v-if="editingIndex !== null" @click="cancelEdit">