diff --git a/src/main/preprocess/MineruPreprocessProvider.ts b/src/main/preprocess/MineruPreprocessProvider.ts
index 11f9ceecd..579a42f35 100644
--- a/src/main/preprocess/MineruPreprocessProvider.ts
+++ b/src/main/preprocess/MineruPreprocessProvider.ts
@@ -42,6 +42,8 @@ type ExtractResultResponse = {
 export default class MineruPreprocessProvider extends BasePreprocessProvider {
   constructor(provider: PreprocessProvider) {
     super(provider)
+    // todo：免费期结束后删除
+    this.provider.apiKey = this.provider.apiKey || import.meta.env.VITE_MINERU_API_KEY
   }
 
   public async parseFile(sourceId: string, file: FileMetadata): Promise<{ processedFile: FileMetadata }> {
diff --git a/src/renderer/src/pages/knowledge/components/AddKnowledgePopup.tsx b/src/renderer/src/pages/knowledge/components/AddKnowledgePopup.tsx
index 09809fb13..14b4205e9 100644
--- a/src/renderer/src/pages/knowledge/components/AddKnowledgePopup.tsx
+++ b/src/renderer/src/pages/knowledge/components/AddKnowledgePopup.tsx
@@ -95,7 +95,10 @@ const PopupContainer: React.FC<Props> = ({ title, resolve }) => {
     const preprocessOptions = {
       label: t('settings.tool.preprocess.provider'),
       title: t('settings.tool.preprocess.provider'),
-      options: preprocessProviders.filter((p) => p.apiKey !== '').map((p) => ({ value: p.id, label: p.name }))
+      options: preprocessProviders
+        // todo: 免费期结束后删除
+        .filter((p) => p.apiKey !== '' || p.id === 'mineru')
+        .map((p) => ({ value: p.id, label: p.name }))
     }
     const ocrOptions = {
       label: t('settings.tool.ocr.provider'),
diff --git a/src/renderer/src/pages/knowledge/components/KnowledgeSettings.tsx b/src/renderer/src/pages/knowledge/components/KnowledgeSettings.tsx
index d82f4be48..b453dbc9c 100644
--- a/src/renderer/src/pages/knowledge/components/KnowledgeSettings.tsx
+++ b/src/renderer/src/pages/knowledge/components/KnowledgeSettings.tsx
@@ -73,7 +73,10 @@ const PopupContainer: React.FC<Props> = ({ base: _base, resolve }) => {
   const preprocessOptions = {
     label: t('settings.tool.preprocess.provider'),
     title: t('settings.tool.preprocess.provider'),
-    options: preprocessProviders.filter((p) => p.apiKey !== '').map((p) => ({ value: p.id, label: p.name }))
+    options: preprocessProviders
+      // todo: 免费期结束后删除
+      .filter((p) => p.apiKey !== '' || p.id === 'mineru')
+      .map((p) => ({ value: p.id, label: p.name }))
   }
   const ocrOptions = {
     label: t('settings.tool.ocr.provider'),
diff --git a/src/renderer/src/pages/settings/ToolSettings/PreprocessSettings/PreprocessSettings.tsx b/src/renderer/src/pages/settings/ToolSettings/PreprocessSettings/PreprocessSettings.tsx
index 95ef161f0..aee88865c 100644
--- a/src/renderer/src/pages/settings/ToolSettings/PreprocessSettings/PreprocessSettings.tsx
+++ b/src/renderer/src/pages/settings/ToolSettings/PreprocessSettings/PreprocessSettings.tsx
@@ -6,7 +6,7 @@ import { PreprocessProvider } from '@renderer/types'
 import { hasObjectKey } from '@renderer/utils'
 import { Avatar, Divider, Flex, Input, InputNumber, Segmented } from 'antd'
 import Link from 'antd/es/typography/Link'
-import { FC, useEffect, useRef, useState } from 'react'
+import { FC, useEffect, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import styled from 'styled-components'
 
@@ -31,8 +31,6 @@ const PreprocessProviderSettings: FC<Props> = ({ provider: _provider }) => {
   const [apiKey, setApiKey] = useState(preprocessProvider.apiKey || '')
   const [apiHost, setApiHost] = useState(preprocessProvider.apiHost || '')
   const [options, setOptions] = useState(preprocessProvider.options || {})
-  // todo: remove this after the next release
-  const hasSetDefaultApiKey = useRef(false)
 
   const preprocessProviderConfig = PREPROCESS_PROVIDER_CONFIG[preprocessProvider.id]
   const apiKeyWebsite = preprocessProviderConfig?.websites?.apiKey
@@ -40,12 +38,6 @@ const PreprocessProviderSettings: FC<Props> = ({ provider: _provider }) => {
 
   useEffect(() => {
     setApiKey(preprocessProvider.apiKey ?? '')
-    // todo: remove this after the next release
-    if (preprocessProvider.id === 'mineru' && !preprocessProvider.apiKey && !hasSetDefaultApiKey.current) {
-      setApiKey(import.meta.env.RENDERER_VITE_MINERU_KEY)
-      console.log('Using default Mineru API key from environment variable.')
-      hasSetDefaultApiKey.current = true
-    }
     setApiHost(preprocessProvider.apiHost ?? '')
     setOptions(preprocessProvider.options ?? {})
   }, [preprocessProvider.apiKey, preprocessProvider.apiHost, preprocessProvider.options])