diff --git a/apps/backend/src/services/fulfillment/kuaishou-cloud/prepare-fulfillment.ts b/apps/backend/src/services/fulfillment/kuaishou-cloud/prepare-fulfillment.ts
index b87779aa..2d0f173c 100644
--- a/apps/backend/src/services/fulfillment/kuaishou-cloud/prepare-fulfillment.ts
+++ b/apps/backend/src/services/fulfillment/kuaishou-cloud/prepare-fulfillment.ts
@@ -484,8 +484,21 @@ export async function refreshKuaishouCloudTaskBindUrl(task: TaskRow, options: Js
           mode: 'reuse_existing_vn',
         }
       }
-    } catch {
-      // 同号取链失败则走退号换号
+    } catch (error) {
+      // 号码已退/已回收/无权限：直接清空绑定，不再走退号换号（避免反复打上游）
+      if (isNumberAlreadyReleasedError(error)) {
+        return clearKuaishouCloudStaleBinding(task, {
+          taskContext,
+          flow,
+          now,
+          actor,
+          source,
+          error,
+          claimUrl: claimLinkState.claimUrl,
+          token: claimLinkState.token || task.claim_token || '',
+        })
+      }
+      // 其他错误走退号换号
     }
   }
 
@@ -512,6 +525,19 @@ export async function refreshKuaishouCloudTaskBindUrl(task: TaskRow, options: Js
       now,
     )
   } catch (error) {
+    // 号码已退/已回收/无权限：直接清空绑定（不再尝试取新号），避免反复打上游
+    if (isNumberAlreadyReleasedError(error)) {
+      return clearKuaishouCloudStaleBinding(task, {
+        taskContext,
+        flow,
+        now,
+        actor,
+        source,
+        error,
+        claimUrl: claimLinkState.claimUrl,
+        token: claimLinkState.token || task.claim_token || '',
+      })
+    }
     oldNumberBackError = error instanceof Error ? error.message : String(error || '退号失败')
     const wrapped = wrapCloudtentaclesOperationError(error, {
       action: 'vn_back',
@@ -743,3 +769,110 @@ async function markKuaishouCloudBindUrlRefreshFailed(
 
   return updatedTask
 }
+
+/** 号码已被上游回收/手动退回/账号换 token 后无操作权限：重试无意义，应清空任务绑定 */
+function isNumberAlreadyReleasedError(error: unknown) {
+  const message = error instanceof Error ? error.message : String(error || '')
+  return (
+    message.includes('权限不足') ||
+    message.includes('没有权限') ||
+    message.includes('不存在') ||
+    message.includes('已释放') ||
+    message.includes('已回收') ||
+    message.includes('已退还')
+  )
+}
+
+/**
+ * 清空任务侧已失效的旧绑定（号码已退/已回收/无权限），任务下次领取时自动重新取号。
+ * 所有调用路径（claim 轮询 probe、open-91 交付、回收任务、后台刷新）统一收敛，
+ * 避免对失效号码反复打上游。
+ */
+async function clearKuaishouCloudStaleBinding(
+  task: TaskRow,
+  {
+    taskContext,
+    flow,
+    now,
+    actor,
+    source,
+    error,
+    claimUrl,
+    token,
+  }: {
+    taskContext: JsonObject
+    flow: ReturnType<typeof normalizeKuaishouCloudFlow>
+    now: string
+    actor: unknown
+    source: string
+    error: unknown
+    claimUrl: string
+    token: string
+  }
+) {
+  const errorMessage = error instanceof Error ? error.message : String(error || '绑定已失效')
+  const oldVnId = flow.binding.vnId
+  const oldVnPhone = flow.binding.vnPhone
+  const nextContext = {
+    ...taskContext,
+    kuaishouCloudFulfillment: {
+      ...flow,
+      binding: {
+        ...flow.binding,
+        prepareStatus: 'pending',
+        vnId: 0,
+        vnPhone: '',
+        bindUrl: '',
+        bindPreparedAt: null,
+        bindExpiresAt: null,
+        bindProbeAt: now,
+        bindProbeStatus: 'stale_cleared',
+        bindProbeMessage: errorMessage,
+        roleName: '',
+        roleId: '',
+      },
+      role: {
+        status: 'pending',
+        name: '',
+        rid: '',
+        refreshedAt: now,
+        errorMessage: '旧绑定号码已失效，已清空绑定，将重新取号',
+        rawInfo: null,
+      },
+    },
+  }
+
+  const updatedTask = await updateTask(task.id, {
+    task_status:
+      normalizeTaskStatus(task.task_status) === TASK_STATUS.ROLE_CONFIRMED
+        ? task.task_status
+        : TASK_STATUS.PENDING_BINDING_PREPARE,
+    role_id: '',
+    role_name: '',
+    last_error: `旧绑定号码已失效（${errorMessage}），已清空绑定`,
+    context_json: JSON.stringify(nextContext),
+    updated_at: now,
+  })
+
+  await createTaskEvent(
+    task.id,
+    'kuaishou_cloud_stale_binding_cleared',
+    {
+      source,
+      oldVnId,
+      oldVnPhoneMasked: maskPhone(oldVnPhone),
+      cloudSourceKey: flow.binding.resolvedSourceKey || flow.binding.cloudSourceKeys[0] || '',
+      errorMessage,
+      actor,
+    },
+    now
+  )
+
+  return {
+    task: updatedTask || task,
+    claimUrl,
+    token,
+    flow: normalizeKuaishouCloudFlow(nextContext.kuaishouCloudFulfillment),
+    mode: 'stale_cleared',
+  }
+}