diff --git a/dolphinscheduler-ui/src/locales/en_US/project.ts b/dolphinscheduler-ui/src/locales/en_US/project.ts
index 7a39752526..5e5ee4b2a9 100644
--- a/dolphinscheduler-ui/src/locales/en_US/project.ts
+++ b/dolphinscheduler-ui/src/locales/en_US/project.ts
@@ -249,7 +249,8 @@ export default {
     delete_task_validate_dependent_tasks_desc:
       'The downstream dependent tasks exists. You can not delete the task.',
     warning_delete_scheduler_dependent_tasks_desc:
-      'The downstream dependent tasks exists. Are you sure to delete the scheduler?'
+      'The downstream dependent tasks exists. Are you sure to delete the scheduler?',
+    warning_too_large_parallelism_number: 'The parallelism number is too large. It is better not to be over 10.'
   },
   task: {
     on_line: 'Online',
diff --git a/dolphinscheduler-ui/src/locales/zh_CN/project.ts b/dolphinscheduler-ui/src/locales/zh_CN/project.ts
index 50e0a821ef..85de0122fb 100644
--- a/dolphinscheduler-ui/src/locales/zh_CN/project.ts
+++ b/dolphinscheduler-ui/src/locales/zh_CN/project.ts
@@ -246,7 +246,8 @@ export default {
     delete_task_validate_dependent_tasks_desc:
       '下游存在依赖，你不能删除该任务.',
     warning_delete_scheduler_dependent_tasks_desc:
-      '下游存在依赖, 删除定时可能会对下游任务产生影响. 你确定要删除该定时嘛?'
+      '下游存在依赖, 删除定时可能会对下游任务产生影响. 你确定要删除该定时嘛?',
+    warning_too_large_parallelism_number: '并行度设置太大了, 最好不要超过10.',
   },
   task: {
     on_line: '线上',
diff --git a/dolphinscheduler-ui/src/views/projects/workflow/definition/components/start-modal.tsx b/dolphinscheduler-ui/src/views/projects/workflow/definition/components/start-modal.tsx
index 872b515844..8a4b07b4bc 100644
--- a/dolphinscheduler-ui/src/views/projects/workflow/definition/components/start-modal.tsx
+++ b/dolphinscheduler-ui/src/views/projects/workflow/definition/components/start-modal.tsx
@@ -44,7 +44,8 @@ import {
   NSwitch,
   NCheckbox,
   NDatePicker,
-  NRadioButton
+  NRadioButton,
+  NInputNumber
 } from 'naive-ui'
 import {
   ArrowDownOutlined,
@@ -75,7 +76,6 @@ export default defineComponent({
   props,
   emits: ['update:show', 'update:row', 'updateList'],
   setup(props, ctx) {
-    const parallelismRef = ref(false)
     const { t } = useI18n()
     const route = useRoute()
     const { startState } = useForm()
@@ -296,7 +296,6 @@ export default defineComponent({
     return {
       t,
       showTaskDependType,
-      parallelismRef,
       hideModal,
       handleStart,
       generalWarningTypeListOptions,
@@ -504,17 +503,20 @@ export default defineComponent({
                   <NFormItem
                     label={t('project.workflow.parallelism')}
                     path='expectedParallelismNumber'
+                    feedback={t(
+                      'project.workflow.warning_too_large_parallelism_number'
+                    )}
+                    validationStatus={'warning'}
+                    showFeedback={
+                      parseInt(this.startForm.expectedParallelismNumber) > 10
+                    }
                   >
-                    <NCheckbox v-model:checked={this.parallelismRef}>
-                      {t('project.workflow.custom_parallelism')}
-                    </NCheckbox>
-                    <NInput
-                      allowInput={this.trim}
-                      disabled={!this.parallelismRef}
+                    <NInputNumber
                       placeholder={t(
                         'project.workflow.please_enter_parallelism'
                       )}
                       v-model:value={this.startForm.expectedParallelismNumber}
+                      min='1'
                     />
                   </NFormItem>
                 )}
diff --git a/dolphinscheduler-ui/src/views/projects/workflow/definition/components/use-form.ts b/dolphinscheduler-ui/src/views/projects/workflow/definition/components/use-form.ts
index 32b02a7880..33dd7ba241 100644
--- a/dolphinscheduler-ui/src/views/projects/workflow/definition/components/use-form.ts
+++ b/dolphinscheduler-ui/src/views/projects/workflow/definition/components/use-form.ts
@@ -66,7 +66,7 @@ export const useForm = () => {
       tenantCode: 'default',
       environmentCode: null,
       startParams: null,
-      expectedParallelismNumber: '',
+      expectedParallelismNumber: '2',
       dryRun: 0,
       testFlag: 0,
       version: null,