diff --git a/ui/src/components/ai-chat/component/inline-params/constants.ts b/ui/src/components/ai-chat/component/inline-params/constants.ts
new file mode 100644
index 00000000000..d4fe24ce528
--- /dev/null
+++ b/ui/src/components/ai-chat/component/inline-params/constants.ts
@@ -0,0 +1,20 @@
+/**
+ * 用户输入参数平铺白名单
+ *
+ * 只有这些 input_type 的字段可以被设置为外置参数（在聊天框上平铺显示）。
+ * 改动这里会影响 3 个消费方，注意同步语义：
+ * - UserInputTitleDialog.vue —— 齿轮弹窗中 select option 的 disabled 判断
+ * - inline-params/index.vue  —— 渲染时兜底过滤，防止白名单被绕过
+ * - base-node/UserInputFieldTable.vue —— 字段类型变更/删除时清理脏数据
+ */
+export const ALLOWED_EXPOSED_TYPES = [
+  'Model',
+  'Knowledge',
+  'SwitchInput',
+  'DatePicker',
+  'TreeSelect',
+  'SingleSelect',
+  'MultiSelect',
+  'RadioCard',
+  'RadioRow',
+] as const
diff --git a/ui/src/workflow/nodes/base-node/component/UserInputFieldTable.vue b/ui/src/workflow/nodes/base-node/component/UserInputFieldTable.vue
index 069930b6a78..f3330b87030 100644
--- a/ui/src/workflow/nodes/base-node/component/UserInputFieldTable.vue
+++ b/ui/src/workflow/nodes/base-node/component/UserInputFieldTable.vue
@@ -96,6 +96,7 @@ import Sortable from 'sortablejs'
 import UserFieldFormDialog from './UserFieldFormDialog.vue'
 import { MsgError } from '@/utils/message'
 import { t } from '@/locales'
+import { ALLOWED_EXPOSED_TYPES } from '@/components/ai-chat/component/inline-params/constants'
 import UserInputTitleDialog from '@/workflow/nodes/base-node/component/UserInputTitleDialog.vue'
 import { input_type_list } from '@/components/dynamics-form/constructor/data'
 const props = defineProps<{ nodeModel: any }>()
@@ -110,6 +111,13 @@ function openAddDialog(data?: any, index?: any) {
   UserFieldFormDialogRef.value.open(data, index)
 }
 
+function removeFromExposed(fieldName: string) {
+  const setting = props.nodeModel.properties.user_input_field_list_setting
+  if (setting?.exposed_fields?.includes(fieldName)) {
+    setting.exposed_fields = setting.exposed_fields.filter((f: string) => f !== fieldName)
+  }
+}
+
 function openChangeTitleDialog() {
   UserInputTitleDialogRef.value.open(
     inputFieldConfig.value,
@@ -120,7 +128,11 @@ function openChangeTitleDialog() {
 }
 
 function deleteField(index: any) {
+  const removed = inputFieldList.value[index]
   inputFieldList.value.splice(index, 1)
+  if (removed?.field) {
+    removeFromExposed(removed.field)
+  }
   props.nodeModel.graphModel.eventCenter.emit('refreshFieldList')
   onDragHandle()
 }
@@ -145,6 +157,9 @@ function refreshFieldList(data: any, index: any) {
   } else {
     inputFieldList.value.push(data)
   }
+  if (!ALLOWED_EXPOSED_TYPES.includes(data.input_type)) {
+    removeFromExposed(data.field)
+  }
   UserFieldFormDialogRef.value.close()
   props.nodeModel.graphModel.eventCenter.emit('refreshFieldList')
   onDragHandle()
diff --git a/ui/src/workflow/nodes/base-node/component/UserInputTitleDialog.vue b/ui/src/workflow/nodes/base-node/component/UserInputTitleDialog.vue
index c38a00ab355..03a7964a13c 100644
--- a/ui/src/workflow/nodes/base-node/component/UserInputTitleDialog.vue
+++ b/ui/src/workflow/nodes/base-node/component/UserInputTitleDialog.vue
@@ -24,7 +24,7 @@
             :label="getFieldLabel(item)"
             :value="item.field"
             :disabled="
-              !allowedTypes.includes(item.input_type) ||
+              !ALLOWED_EXPOSED_TYPES.includes(item.input_type) ||
               (form.exposed_fields.length >= 3 && !form.exposed_fields.includes(item.field))
             "
           />
@@ -53,6 +53,7 @@
 import { reactive, ref } from 'vue'
 import type { FormInstance } from 'element-plus'
 import { t } from '@/locales'
+import { ALLOWED_EXPOSED_TYPES } from '@/components/ai-chat/component/inline-params/constants'
 const emit = defineEmits(['refresh'])
 
 const fieldFormRef = ref()
@@ -68,17 +69,6 @@ const rules = reactive({
   menu_title: [{ required: true, message: t('common.inputPlaceholder'), trigger: 'blur' }],
 })
 
-const allowedTypes = [
-  'Model',
-  'Knowledge',
-  'SwitchInput',
-  'DatePicker',
-  'TreeSelect',
-  'SingleSelect',
-  'MultiSelect',
-  'RadioCard',
-  'RadioRow',
-]
 const dialogVisible = ref<boolean>(false)
 
 const getFieldLabel = (item: any) => {