diff --git a/lib/__tests__/dingtalk-client.test.ts b/lib/__tests__/dingtalk-client.test.ts
new file mode 100644
index 0000000..130cba4
--- /dev/null
+++ b/lib/__tests__/dingtalk-client.test.ts
@@ -0,0 +1,74 @@
+/** @jest-environment node */
+
+describe('dingtalk client', () => {
+  const originalEnv = process.env
+
+  beforeEach(() => {
+    jest.resetModules()
+    process.env = { ...originalEnv }
+    delete process.env.DINGTALK_CLIENT_ID
+    delete process.env.DINGTALK_CLIENT_SECRET
+    delete process.env.DINGTALK_WORK_NOTICE_CLIENT_ID
+    delete process.env.DINGTALK_WORK_NOTICE_CLIENT_SECRET
+    delete process.env.DINGTALK_WORK_NOTICE_AGENT_ID
+    global.fetch = jest.fn()
+  })
+
+  afterEach(() => {
+    process.env = originalEnv
+    jest.restoreAllMocks()
+  })
+
+  test('工作通知优先使用独立应用凭证获取 token', async () => {
+    process.env.DINGTALK_CLIENT_ID = 'login-client-id'
+    process.env.DINGTALK_CLIENT_SECRET = 'login-client-secret'
+    process.env.DINGTALK_WORK_NOTICE_CLIENT_ID = 'notice-client-id'
+    process.env.DINGTALK_WORK_NOTICE_CLIENT_SECRET = 'notice-client-secret'
+    process.env.DINGTALK_WORK_NOTICE_AGENT_ID = '4279191869'
+
+    ;(global.fetch as jest.Mock)
+      .mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({ errcode: 0, access_token: 'notice-token', expires_in: 7200 }),
+      })
+      .mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({ errcode: 0, task_id: 123, request_id: 'request-1' }),
+      })
+
+    const { sendDingtalkWorkNotice } = await import('@/lib/dingtalk-client')
+
+    await sendDingtalkWorkNotice({
+      userIds: ['ding-user-1'],
+      title: '测试通知',
+      text: '这是一条测试通知',
+    })
+
+    expect(global.fetch).toHaveBeenNthCalledWith(
+      1,
+      expect.stringContaining('appkey=notice-client-id'),
+    )
+    expect(global.fetch).toHaveBeenNthCalledWith(
+      1,
+      expect.not.stringContaining('appkey=login-client-id'),
+    )
+    const [, sendOptions] = (global.fetch as jest.Mock).mock.calls[1]
+    expect(JSON.parse(sendOptions.body)).toEqual(expect.objectContaining({
+      agent_id: 4279191869,
+      userid_list: 'ding-user-1',
+    }))
+  })
+
+  test('工作通知未配置独立凭证时仍可复用登录应用凭证', async () => {
+    process.env.DINGTALK_CLIENT_ID = 'login-client-id'
+    process.env.DINGTALK_CLIENT_SECRET = 'login-client-secret'
+    process.env.DINGTALK_WORK_NOTICE_AGENT_ID = '123'
+
+    const { getDingtalkWorkNoticeConfigStatus } = await import('@/lib/dingtalk-client')
+
+    expect(getDingtalkWorkNoticeConfigStatus()).toEqual(expect.objectContaining({
+      ready: true,
+      appSource: 'login',
+    }))
+  })
+})
diff --git a/lib/dingtalk-client.ts b/lib/dingtalk-client.ts
index a359fba..a983cb1 100644
--- a/lib/dingtalk-client.ts
+++ b/lib/dingtalk-client.ts
@@ -13,9 +13,15 @@ type DingtalkWorkNoticeResult = {
   raw?: unknown
 }
 
-let cachedAppToken: { token: string; expiresAt: number } | null = null
+type DingtalkAppConfig = {
+  appKey: string
+  appSecret: string
+  source: 'login' | 'workNotice'
+}
 
-function getDingtalkAppConfig() {
+const cachedAppTokens = new Map<string, { token: string; expiresAt: number }>()
+
+function getDingtalkAppConfig(): DingtalkAppConfig {
   const appKey = process.env.DINGTALK_CLIENT_ID || process.env.DINGTALK_APP_KEY
   const appSecret = process.env.DINGTALK_CLIENT_SECRET || process.env.DINGTALK_APP_SECRET
 
@@ -23,26 +29,99 @@ function getDingtalkAppConfig() {
     throw new Error('钉钉应用未配置 DINGTALK_CLIENT_ID/DINGTALK_CLIENT_SECRET')
   }
 
-  return { appKey, appSecret }
+  return { appKey, appSecret, source: 'login' }
+}
+
+function getDingtalkWorkNoticeAppConfig(): DingtalkAppConfig {
+  const workNoticeAppKey =
+    process.env.DINGTALK_WORK_NOTICE_CLIENT_ID || process.env.DINGTALK_WORK_NOTICE_APP_KEY
+  const workNoticeAppSecret =
+    process.env.DINGTALK_WORK_NOTICE_CLIENT_SECRET || process.env.DINGTALK_WORK_NOTICE_APP_SECRET
+
+  if (workNoticeAppKey || workNoticeAppSecret) {
+    if (!workNoticeAppKey || !workNoticeAppSecret) {
+      throw new Error('钉钉工作通知应用未完整配置 DINGTALK_WORK_NOTICE_CLIENT_ID/DINGTALK_WORK_NOTICE_CLIENT_SECRET')
+    }
+
+    return {
+      appKey: workNoticeAppKey,
+      appSecret: workNoticeAppSecret,
+      source: 'workNotice',
+    }
+  }
+
+  return getDingtalkAppConfig()
 }
 
 function getDingtalkWorkNoticeAgentId() {
   return process.env.DINGTALK_WORK_NOTICE_AGENT_ID || process.env.DINGTALK_AGENT_ID || ''
 }
 
+export function getDingtalkWorkNoticeConfigStatus() {
+  const workNoticeAppKey =
+    process.env.DINGTALK_WORK_NOTICE_CLIENT_ID || process.env.DINGTALK_WORK_NOTICE_APP_KEY
+  const workNoticeAppSecret =
+    process.env.DINGTALK_WORK_NOTICE_CLIENT_SECRET || process.env.DINGTALK_WORK_NOTICE_APP_SECRET
+  const loginAppKey = process.env.DINGTALK_CLIENT_ID || process.env.DINGTALK_APP_KEY
+  const loginAppSecret = process.env.DINGTALK_CLIENT_SECRET || process.env.DINGTALK_APP_SECRET
+  const agentId = getDingtalkWorkNoticeAgentId()
+  const numericAgentId = Number(agentId)
+  const workNoticeAppPartiallyConfigured = Boolean(workNoticeAppKey || workNoticeAppSecret)
+  const workNoticeAppConfigured = Boolean(workNoticeAppKey && workNoticeAppSecret)
+  const loginAppConfigured = Boolean(loginAppKey && loginAppSecret)
+  const appConfigured = workNoticeAppPartiallyConfigured
+    ? workNoticeAppConfigured
+    : loginAppConfigured
+  const agentConfigured = Boolean(agentId && Number.isFinite(numericAgentId) && numericAgentId > 0)
+  const missing: string[] = []
+
+  if (!appConfigured) {
+    missing.push(
+      workNoticeAppPartiallyConfigured
+        ? 'DINGTALK_WORK_NOTICE_CLIENT_ID/DINGTALK_WORK_NOTICE_CLIENT_SECRET'
+        : 'DINGTALK_WORK_NOTICE_CLIENT_ID/DINGTALK_WORK_NOTICE_CLIENT_SECRET 或 DINGTALK_CLIENT_ID/DINGTALK_CLIENT_SECRET',
+    )
+  }
+  if (!agentConfigured) {
+    missing.push('DINGTALK_WORK_NOTICE_AGENT_ID')
+  }
+
+  return {
+    ready: appConfigured && agentConfigured,
+    appConfigured,
+    agentConfigured,
+    appSource: workNoticeAppPartiallyConfigured ? 'workNotice' : loginAppConfigured ? 'login' : null,
+    agentSource: process.env.DINGTALK_WORK_NOTICE_AGENT_ID
+      ? 'DINGTALK_WORK_NOTICE_AGENT_ID'
+      : process.env.DINGTALK_AGENT_ID
+        ? 'DINGTALK_AGENT_ID'
+        : null,
+    missing,
+  }
+}
+
 function truncateText(value: string, maxLength = 4800) {
   const normalized = String(value || '').trim()
   return normalized.length > maxLength ? `${normalized.slice(0, maxLength)}...` : normalized
 }
 
 export async function getDingtalkAppAccessToken() {
+  return getDingtalkAccessToken(getDingtalkAppConfig())
+}
+
+async function getDingtalkWorkNoticeAccessToken() {
+  return getDingtalkAccessToken(getDingtalkWorkNoticeAppConfig())
+}
+
+async function getDingtalkAccessToken(config: DingtalkAppConfig) {
+  const cacheKey = `${config.source}:${config.appKey}:${config.appSecret.slice(-8)}`
+  const cachedAppToken = cachedAppTokens.get(cacheKey)
   if (cachedAppToken && cachedAppToken.expiresAt > Date.now() + 60_000) {
     return cachedAppToken.token
   }
 
-  const { appKey, appSecret } = getDingtalkAppConfig()
   const response = await fetch(
-    `https://oapi.dingtalk.com/gettoken?appkey=${encodeURIComponent(appKey)}&appsecret=${encodeURIComponent(appSecret)}`,
+    `https://oapi.dingtalk.com/gettoken?appkey=${encodeURIComponent(config.appKey)}&appsecret=${encodeURIComponent(config.appSecret)}`,
   )
 
   if (!response.ok) {
@@ -55,12 +134,13 @@ export async function getDingtalkAppAccessToken() {
   }
 
   const expiresIn = Number(data.expires_in || 7200)
-  cachedAppToken = {
-    token: String(data.access_token),
+  const nextToken = String(data.access_token)
+  cachedAppTokens.set(cacheKey, {
+    token: nextToken,
     expiresAt: Date.now() + Math.max(60, expiresIn - 120) * 1000,
-  }
+  })
 
-  return cachedAppToken.token
+  return nextToken
 }
 
 export async function sendDingtalkWorkNotice(
@@ -93,7 +173,7 @@ export async function sendDingtalkWorkNotice(
     }
   }
 
-  const token = await getDingtalkAppAccessToken()
+  const token = await getDingtalkWorkNoticeAccessToken()
   const actionText = input.actionUrl ? `\n\n[打开素材库查看](${input.actionUrl})` : ''
   const markdownText = truncateText(`${input.text}${actionText}`)
 
diff --git a/lib/env-validation.ts b/lib/env-validation.ts
index 94902d3..dad586b 100644
--- a/lib/env-validation.ts
+++ b/lib/env-validation.ts
@@ -66,6 +66,10 @@ const OPTIONAL_ENV_VARS = [
   'DINGTALK_APP_SECRET',
   'DINGTALK_CLIENT_ID',
   'DINGTALK_CLIENT_SECRET',
+  'DINGTALK_WORK_NOTICE_CLIENT_ID',
+  'DINGTALK_WORK_NOTICE_CLIENT_SECRET',
+  'DINGTALK_WORK_NOTICE_APP_KEY',
+  'DINGTALK_WORK_NOTICE_APP_SECRET',
   'DINGTALK_WORK_NOTICE_AGENT_ID',
   'DINGTALK_AGENT_ID',
   'REPORT_DB_SERVER',