diff --git a/frontend/scripts/regression-data-process-wizard.mjs b/frontend/scripts/regression-data-process-wizard.mjs
index e9ceaf0..4029f0e 100644
--- a/frontend/scripts/regression-data-process-wizard.mjs
+++ b/frontend/scripts/regression-data-process-wizard.mjs
@@ -110,7 +110,7 @@ assert.match(
   /const \{ buildPreviewsByFile \} = useDataProcessPreviewBuild\(\)/,
   '父页面没有通过独立 composable 构建逐文件预览',
 )
-assert.match(viewSource, /backend-pipeline-v3/, '切分管线版本未升级，旧预览缓存可能被误用')
+assert.match(viewSource, /backend-pipeline-v4/, '切分管线版本未升级，旧预览缓存可能被误用')
 assert.match(viewSource, /getDataProcessPreview\(taskId\.value,\s*\{ page:\s*1, page_size:\s*500 \}\)/, '预览构建后没有分页读取后端数据')
 assert.doesNotMatch(viewSource, /buildPreviewItems\(/, '创建向导仍在本地构建集成预览数据')
 
@@ -501,7 +501,7 @@ const smartOptionValues = [...smartOptionsSource.matchAll(/^\s*'([^']+)',?$/gm)]
 assert.deepEqual(smartOptionValues, expectedSmartPreprocessOptions, '智能预处理内部值与后端语义不一致')
 assert.equal(new Set(smartOptionValues).size, smartOptionValues.length, '非结构化智能预处理 value 必须唯一')
 for (const descriptionPart of [
-  '清理无效内容',
+  '清理页眉页脚、页码、目录和无效内容',
   '感知文档结构',
   '合并短块',
   '预过滤低质量内容',
diff --git a/frontend/src/views/data-process/DataProcessCreateView.vue b/frontend/src/views/data-process/DataProcessCreateView.vue
index 4ff5853..7f7e2f2 100644
--- a/frontend/src/views/data-process/DataProcessCreateView.vue
+++ b/frontend/src/views/data-process/DataProcessCreateView.vue
@@ -57,7 +57,7 @@ const generationModels = computed(() => modelList.value)
 const taskSetupRef = ref<InstanceType<typeof TaskSetupStep>>()
 const modelSelectionRef = ref<InstanceType<typeof ModelSelectionStep>>()
 const confirmDialogRef = ref<InstanceType<typeof AppConfirmDialog>>()
-const PREVIEW_MODEL_VERSION = 'backend-pipeline-v3'
+const PREVIEW_MODEL_VERSION = 'backend-pipeline-v4'
 const WIZARD_STEPS = [
   { id: 'create', title: '创建任务', desc: '填写任务信息与处理配置' },
   { id: 'model', title: '大模型选择', desc: '选择生成模型并设置输出要求' },
diff --git a/frontend/src/views/data-process/create/UnstructuredOptionsPanel.vue b/frontend/src/views/data-process/create/UnstructuredOptionsPanel.vue
index fdb5975..0b56558 100644
--- a/frontend/src/views/data-process/create/UnstructuredOptionsPanel.vue
+++ b/frontend/src/views/data-process/create/UnstructuredOptionsPanel.vue
@@ -128,7 +128,7 @@ defineExpose({ revealValidation })
         />
         <span class="preprocess-option-copy">
           <strong>智能预处理</strong>
-          <small>清理无效内容、感知文档结构、合并短块、预过滤低质量内容、近重复去重，并通过重叠保护上下文</small>
+          <small>清理页眉页脚、页码、目录和无效内容，感知文档结构、合并短块、预过滤低质量内容、近重复去重，并通过重叠保护上下文</small>
         </span>
       </label>