diff --git a/apps/backend/src/services/worker-platform/index.ts b/apps/backend/src/services/worker-platform/index.ts
index d170a019..3901fcbc 100644
--- a/apps/backend/src/services/worker-platform/index.ts
+++ b/apps/backend/src/services/worker-platform/index.ts
@@ -7,6 +7,7 @@ export * from './worker-session-auth-service.js'
 export * from './worker-credentials-service.js'
 export * from './worker-sms-service.js'
 export * from './worker-registration-service.js'
+export * from './worker-login-service.js'
 export * from './worker-platform-defaults.js'
 export * from './work-order-timeout-policy.js'
 export * from './after-sales-service.js'
diff --git a/apps/backend/src/services/worker-platform/worker-login-service.ts b/apps/backend/src/services/worker-platform/worker-login-service.ts
new file mode 100644
index 00000000..c6de2243
--- /dev/null
+++ b/apps/backend/src/services/worker-platform/worker-login-service.ts
@@ -0,0 +1,187 @@
+import {
+  consumeWorkerSmsCode,
+  createWorkerSessionRecord,
+  getLatestWorkerSmsCode,
+  getWorkerUserByDisplayName,
+  getWorkerUserByPhone,
+  getWorkerUserByUsername,
+  recordWorkerSmsCodeFailure,
+  type WorkerUserRow,
+} from '../../repositories/worker-platform/index.js'
+import { createHttpError } from '../../utils/http.js'
+import { nowIso } from '../../utils/time.js'
+import {
+  createWorkerSession,
+  ensureWorkerAuthConfigured,
+  isWorkerPasswordStrong,
+  normalizePassword,
+  normalizeSessionVersion,
+  normalizeUsername,
+  verifyWorkerPassword,
+} from './mappers.js'
+import {
+  assertWorkerLoginAllowed,
+  normalizeWorkerDeviceId,
+  normalizeWorkerDeviceName,
+  normalizeWorkerDeviceType,
+} from './worker-auth-policy.js'
+import { deleteWorkerSession, getWorkerSessions } from './worker-session-auth-service.js'
+import type { WorkerSession } from './worker-session-context-service.js'
+import { hashSmsCode, normalizeWorkerPhone } from './worker-sms-service.js'
+
+const WORKER_MAX_DEVICES = 3
+const WORKER_SMS_MAX_VERIFY_ATTEMPTS = 5
+
+type WorkerLoginDeviceInfo = {
+  deviceId?: unknown
+  deviceType?: unknown
+  deviceName?: unknown
+  userAgent?: unknown
+  ipAddress?: unknown
+}
+
+export async function loginWorker(
+  username: unknown,
+  password: unknown,
+  deviceInfo: WorkerLoginDeviceInfo = {},
+) {
+  ensureWorkerAuthConfigured()
+  const normalizedPassword = normalizePassword(password)
+  const worker = await authenticateWorkerCredentials(username, password)
+  return createWorkerLoginSession(worker, deviceInfo, !isWorkerPasswordStrong(normalizedPassword))
+}
+
+export async function loginWorkerBySmsCode(
+  phoneValue: unknown,
+  codeValue: unknown,
+  deviceInfo: WorkerLoginDeviceInfo = {},
+) {
+  ensureWorkerAuthConfigured()
+  const phone = normalizeWorkerPhone(phoneValue)
+  const code = String(codeValue || '').trim()
+  if (!code) {
+    throw createHttpError('请输入短信验证码', {
+      statusCode: 400,
+      errorCode: 'worker_sms_code_required',
+    })
+  }
+  const worker = await getWorkerUserByPhone(phone)
+  const latest = await getLatestWorkerSmsCode(phone, 'login')
+  const codeValid = Boolean(
+    latest &&
+    !latest.consumed_at &&
+    new Date(latest.expires_at).getTime() > Date.now() &&
+    latest.code_hash === hashSmsCode(code),
+  )
+  if (!worker || !codeValid) {
+    if (latest && !latest.consumed_at) {
+      const failed = await recordWorkerSmsCodeFailure(
+        latest.id,
+        nowIso(),
+        WORKER_SMS_MAX_VERIFY_ATTEMPTS,
+      )
+      if (failed?.consumed_at) {
+        throw createHttpError('验证码错误次数过多，请重新获取验证码', {
+          statusCode: 400,
+          errorCode: 'worker_sms_code_locked',
+        })
+      }
+    }
+    throw createHttpError('手机号或验证码错误', {
+      statusCode: 401,
+      errorCode: 'worker_sms_code_invalid',
+    })
+  }
+  if (!(await consumeWorkerSmsCode(latest!.id, nowIso()))) {
+    throw createHttpError('验证码已失效，请重新获取', {
+      statusCode: 400,
+      errorCode: 'worker_sms_code_invalid',
+    })
+  }
+  assertWorkerLoginAllowed(worker)
+  return createWorkerLoginSession(worker, deviceInfo, false)
+}
+
+export async function manageWorkerSessions(username: unknown, password: unknown) {
+  const worker = await authenticateWorkerCredentials(username, password)
+  return getWorkerSessions(createCredentialSession(worker))
+}
+
+export async function deleteWorkerSessionWithCredentials(
+  username: unknown,
+  password: unknown,
+  targetSessionId: unknown,
+) {
+  const worker = await authenticateWorkerCredentials(username, password)
+  return deleteWorkerSession(createCredentialSession(worker), targetSessionId)
+}
+
+async function createWorkerLoginSession(
+  worker: WorkerUserRow,
+  deviceInfo: WorkerLoginDeviceInfo,
+  passwordWeak: boolean,
+) {
+  const session = createWorkerSession(worker)
+  const deviceType = normalizeWorkerDeviceType(deviceInfo.deviceType)
+  const sessionRecord = await createWorkerSessionRecord({
+    sessionId: session.sessionId,
+    workerId: Number(worker.id),
+    deviceId: normalizeWorkerDeviceId(deviceInfo.deviceId, session.sessionId),
+    deviceType,
+    deviceName: normalizeWorkerDeviceName(deviceInfo.deviceName, deviceType),
+    userAgent: String(deviceInfo.userAgent || '')
+      .trim()
+      .slice(0, 500),
+    ipAddress: String(deviceInfo.ipAddress || '')
+      .trim()
+      .slice(0, 100),
+    issuedAt: new Date().toISOString(),
+    expiresAt: session.expiresAt,
+    now: nowIso(),
+    maxDevices: WORKER_MAX_DEVICES,
+  })
+  if (!sessionRecord.created) {
+    throw createHttpError('在线设备已达到 3 台，请先删除旧的登录设备', {
+      statusCode: 409,
+      errorCode: 'worker_device_limit',
+    })
+  }
+  return { ...session, passwordWeak }
+}
+
+async function authenticateWorkerCredentials(
+  username: unknown,
+  password: unknown,
+): Promise<WorkerUserRow> {
+  const normalizedUsername = normalizeUsername(username)
+  const normalizedPassword = normalizePassword(password)
+  if (!normalizedUsername || !normalizedPassword) {
+    throw createHttpError('缺少接单账号或密码', {
+      statusCode: 400,
+      errorCode: 'worker_credentials_required',
+    })
+  }
+  const worker =
+    (await getWorkerUserByUsername(normalizedUsername)) ||
+    (await getWorkerUserByPhone(normalizedUsername)) ||
+    (await getWorkerUserByDisplayName(normalizedUsername))
+  if (!worker || !verifyWorkerPassword(normalizedPassword, worker.password_hash)) {
+    throw createHttpError('账号或密码错误', {
+      statusCode: 401,
+      errorCode: 'worker_login_failed',
+    })
+  }
+  assertWorkerLoginAllowed(worker)
+  return worker
+}
+
+function createCredentialSession(worker: WorkerUserRow): WorkerSession {
+  return {
+    sessionId: '',
+    workerId: Number(worker.id),
+    username: worker.username,
+    status: worker.status,
+    expiresAt: '',
+    sessionVersion: normalizeSessionVersion(worker.session_version),
+  }
+}
diff --git a/apps/backend/src/services/worker-platform/worker-service.ts b/apps/backend/src/services/worker-platform/worker-service.ts
index 11f421f4..5aae8eb7 100644
--- a/apps/backend/src/services/worker-platform/worker-service.ts
+++ b/apps/backend/src/services/worker-platform/worker-service.ts
@@ -145,6 +145,12 @@ import {
   normalizeWorkerDeviceType,
 } from './worker-auth-policy.js'
 import { ensureWorkerPlatformDefaults } from './worker-platform-defaults.js'
+import {
+  deleteWorkerSessionWithCredentials,
+  loginWorker,
+  loginWorkerBySmsCode,
+  manageWorkerSessions,
+} from './worker-login-service.js'
 import { registerWorker, resetWorkerPassword } from './worker-registration-service.js'
 import {
   hashSmsCode,
@@ -175,6 +181,12 @@ export {
 export type { WorkerSession } from './worker-session-context-service.js'
 export { assertWorkerLoginAllowed } from './worker-auth-policy.js'
 export { ensureWorkerPlatformDefaults } from './worker-platform-defaults.js'
+export {
+  deleteWorkerSessionWithCredentials,
+  loginWorker,
+  loginWorkerBySmsCode,
+  manageWorkerSessions,
+} from './worker-login-service.js'
 export {
   isWorkOrderTimeoutPolicy,
   normalizeWorkOrderTimeoutPolicy,
@@ -196,185 +208,6 @@ export {
   verifyWorkerSessionToken,
 } from './worker-session-auth-service.js'
 
-const WORKER_MAX_DEVICES = 3
-
-export async function loginWorker(
-  username: unknown,
-  password: unknown,
-  deviceInfo: {
-    deviceId?: unknown
-    deviceType?: unknown
-    deviceName?: unknown
-    userAgent?: unknown
-    ipAddress?: unknown
-  } = {},
-) {
-  ensureWorkerAuthConfigured()
-  const normalizedPassword = normalizePassword(password)
-  const worker = await authenticateWorkerCredentials(username, password)
-
-  return createWorkerLoginSession(worker, deviceInfo, !isWorkerPasswordStrong(normalizedPassword))
-}
-
-export async function loginWorkerBySmsCode(
-  phoneValue: unknown,
-  codeValue: unknown,
-  deviceInfo: {
-    deviceId?: unknown
-    deviceType?: unknown
-    deviceName?: unknown
-    userAgent?: unknown
-    ipAddress?: unknown
-  } = {},
-) {
-  ensureWorkerAuthConfigured()
-  const phone = normalizeWorkerPhone(phoneValue)
-  const code = String(codeValue || '').trim()
-  if (!code) {
-    throw createHttpError('请输入短信验证码', {
-      statusCode: 400,
-      errorCode: 'worker_sms_code_required',
-    })
-  }
-  const worker = await getWorkerUserByPhone(phone)
-  const latest = await getLatestWorkerSmsCode(phone, 'login')
-  const codeValid = Boolean(
-    latest &&
-    !latest.consumed_at &&
-    new Date(latest.expires_at).getTime() > Date.now() &&
-    latest.code_hash === hashSmsCode(code),
-  )
-  if (!worker || !codeValid) {
-    if (latest && !latest.consumed_at) {
-      const failed = await recordWorkerSmsCodeFailure(
-        latest.id,
-        nowIso(),
-        WORKER_SMS_MAX_VERIFY_ATTEMPTS,
-      )
-      if (failed?.consumed_at) {
-        throw createHttpError('验证码错误次数过多，请重新获取验证码', {
-          statusCode: 400,
-          errorCode: 'worker_sms_code_locked',
-        })
-      }
-    }
-    throw createHttpError('手机号或验证码错误', {
-      statusCode: 401,
-      errorCode: 'worker_sms_code_invalid',
-    })
-  }
-  if (!(await consumeWorkerSmsCode(latest!.id, nowIso()))) {
-    throw createHttpError('验证码已失效，请重新获取', {
-      statusCode: 400,
-      errorCode: 'worker_sms_code_invalid',
-    })
-  }
-  assertWorkerLoginAllowed(worker)
-  return createWorkerLoginSession(worker, deviceInfo, false)
-}
-
-async function createWorkerLoginSession(
-  worker: WorkerUserRow,
-  deviceInfo: {
-    deviceId?: unknown
-    deviceType?: unknown
-    deviceName?: unknown
-    userAgent?: unknown
-    ipAddress?: unknown
-  },
-  passwordWeak: boolean,
-) {
-  const session = createWorkerSession(worker)
-  const deviceType = normalizeWorkerDeviceType(deviceInfo.deviceType)
-  const deviceId = normalizeWorkerDeviceId(deviceInfo.deviceId, session.sessionId)
-  const sessionRecord = await createWorkerSessionRecord({
-    sessionId: session.sessionId,
-    workerId: Number(worker.id),
-    deviceId,
-    deviceType,
-    deviceName: normalizeWorkerDeviceName(deviceInfo.deviceName, deviceType),
-    userAgent: String(deviceInfo.userAgent || '')
-      .trim()
-      .slice(0, 500),
-    ipAddress: String(deviceInfo.ipAddress || '')
-      .trim()
-      .slice(0, 100),
-    issuedAt: new Date().toISOString(),
-    expiresAt: session.expiresAt,
-    now: nowIso(),
-    maxDevices: WORKER_MAX_DEVICES,
-  })
-  if (!sessionRecord.created) {
-    throw createHttpError('在线设备已达到 3 台，请先删除旧的登录设备', {
-      statusCode: 409,
-      errorCode: 'worker_device_limit',
-    })
-  }
-
-  return {
-    ...session,
-    passwordWeak,
-  }
-}
-
-export async function manageWorkerSessions(username: unknown, password: unknown) {
-  const worker = await authenticateWorkerCredentials(username, password)
-  return getWorkerSessions({
-    sessionId: '',
-    workerId: Number(worker.id),
-    username: worker.username,
-    status: worker.status,
-    expiresAt: '',
-    sessionVersion: normalizeSessionVersion(worker.session_version),
-  })
-}
-
-export async function deleteWorkerSessionWithCredentials(
-  username: unknown,
-  password: unknown,
-  targetSessionId: unknown,
-) {
-  const worker = await authenticateWorkerCredentials(username, password)
-  return deleteWorkerSession(
-    {
-      sessionId: '',
-      workerId: Number(worker.id),
-      username: worker.username,
-      status: worker.status,
-      expiresAt: '',
-      sessionVersion: normalizeSessionVersion(worker.session_version),
-    },
-    targetSessionId,
-  )
-}
-
-async function authenticateWorkerCredentials(
-  username: unknown,
-  password: unknown,
-): Promise<WorkerUserRow> {
-  const normalizedUsername = normalizeUsername(username)
-  const normalizedPassword = normalizePassword(password)
-  if (!normalizedUsername || !normalizedPassword) {
-    throw createHttpError('缺少接单账号或密码', {
-      statusCode: 400,
-      errorCode: 'worker_credentials_required',
-    })
-  }
-
-  const worker =
-    (await getWorkerUserByUsername(normalizedUsername)) ||
-    (await getWorkerUserByPhone(normalizedUsername)) ||
-    (await getWorkerUserByDisplayName(normalizedUsername))
-  if (!worker || !verifyWorkerPassword(normalizedPassword, worker.password_hash)) {
-    throw createHttpError('账号或密码错误', {
-      statusCode: 401,
-      errorCode: 'worker_login_failed',
-    })
-  }
-  assertWorkerLoginAllowed(worker)
-  return worker
-}
-
 export async function getWorkerProfile(session: WorkerSession) {
   const worker = await getRequiredWorker(session.workerId)
   const [