diff --git a/apps/backend/src/services/worker-platform/admin-worker-user-service.ts b/apps/backend/src/services/worker-platform/admin-worker-user-service.ts
index 40436a95..6f72a268 100644
--- a/apps/backend/src/services/worker-platform/admin-worker-user-service.ts
+++ b/apps/backend/src/services/worker-platform/admin-worker-user-service.ts
@@ -77,10 +77,17 @@ export async function reviewAdminWorkerUser(
   operatorUsername: string = '',
 ) {
   const worker = await getRequiredWorker(workerId)
-  const status = normalizeReviewStatus(payload.status)
+  const status =
+    payload.status !== undefined && payload.status !== null
+      ? normalizeReviewStatus(payload.status)
+      : worker.status
+  const isNewlyRejected = status === 'rejected' && worker.status !== 'rejected'
+  const rawFreezeReason = payload.freezeReason ?? payload.freeze_reason
   const freezeReason =
     status === 'rejected'
-      ? normalizeWorkerFreezeReason(payload.freezeReason ?? payload.freeze_reason)
+      ? isNewlyRejected || rawFreezeReason !== undefined
+        ? normalizeWorkerFreezeReason(rawFreezeReason ?? worker.frozen_reason)
+        : worker.frozen_reason || ''
       : worker.frozen_reason || ''
   const workerType = normalizeWorkerType(payload.workerType ?? payload.worker_type)
   const requestedLevelId = normalizeOptionalId(payload.levelId)
diff --git a/apps/backend/src/services/worker-platform/worker-platform-service.test.ts b/apps/backend/src/services/worker-platform/worker-platform-service.test.ts
index 5fbe6543..428f1e23 100644
--- a/apps/backend/src/services/worker-platform/worker-platform-service.test.ts
+++ b/apps/backend/src/services/worker-platform/worker-platform-service.test.ts
@@ -3050,3 +3050,12 @@ test('接单排行榜必须有短缓存（单次全表聚合 277MB/742ms，独
     '排行榜缓存键必须包含 workerId 与 period',
   )
 })
+
+test('已冻结打手调级或变更资料不应因未传 freezeReason 报错', async () => {
+  const { readFile } = await import('node:fs/promises')
+  const src = await readFile(new URL('./admin-worker-user-service.ts', import.meta.url), 'utf8')
+  assert.ok(
+    src.includes('isNewlyRejected'),
+    '必须区分是否为新冻结，防止已冻结账号调级时抛出 freeze_reason 必填错误',
+  )
+})
diff --git a/apps/frontend/src/pages/admin/panels/WorkersPanel.tsx b/apps/frontend/src/pages/admin/panels/WorkersPanel.tsx
index 9d245f67..1c46aea6 100644
--- a/apps/frontend/src/pages/admin/panels/WorkersPanel.tsx
+++ b/apps/frontend/src/pages/admin/panels/WorkersPanel.tsx
@@ -405,6 +405,7 @@ export default function WorkersPanel() {
         status: levelWorker.status,
         levelId: Number(values.levelId || 0),
         reviewNote: levelWorker.reviewNote,
+        freezeReason: levelWorker.freezeReason,
         isLevelLocked: Boolean(values.isLevelLocked),
         levelLockedReason: values.levelLockedReason?.trim() || undefined,
       })