diff --git a/apps/backend/src/services/fulfillment/kuaishou-cloud-task-service.js b/apps/backend/src/services/fulfillment/kuaishou-cloud-task-service.js
index c2e4943c..f328f402 100644
--- a/apps/backend/src/services/fulfillment/kuaishou-cloud-task-service.js
+++ b/apps/backend/src/services/fulfillment/kuaishou-cloud-task-service.js
@@ -101,6 +101,10 @@ export function normalizeKuaishouCloudFlow(value) {
         String(binding.prepareStatus || "pending").trim() || "pending",
       cloudSourceKey:
         String(binding.cloudSourceKey || "default").trim() || "default",
+      cloudSourceKeyFallbacks: normalizeStringArray(
+        binding.cloudSourceKeyFallbacks
+      ),
+      resolvedSourceKey: String(binding.resolvedSourceKey || "").trim(),
       skuId: Number(binding.skuId || 0) || 0,
       skuName: String(binding.skuName || "").trim(),
       vnKey:
@@ -219,6 +223,66 @@ export function resolvePersistedCloudtentaclesContext(sourceKey = "default") {
   };
 }
 
+/**
+ * 按优先级依次尝试 cloudSourceKey 和 fallbacks 列表中的账号，
+ * 找到第一个有可用 token 的账号返回其 context。
+ * 将实际使用的 resolvedSourceKey 也返回，确保后续操作（退号、发货等）
+ * 使用同一个 sourceKey，防止跨账号操作导致数据不一致。
+ */
+export function resolvePersistedCloudtentaclesContextWithFallback(
+  primarySourceKey = "default",
+  fallbacks = []
+) {
+  const candidates = [
+    String(primarySourceKey || "default").trim() || "default",
+    ...normalizeStringArray(fallbacks),
+  ];
+
+  // 去重但保持顺序
+  const uniqueCandidates = [...new Set(candidates)];
+
+  let lastError = null;
+
+  for (const sourceKey of uniqueCandidates) {
+    const source = getCloudtentaclesSourceByKey(sourceKey);
+    const session = getCloudtentaclesSessionStateByKey(sourceKey);
+
+    // 该账号不存在配置 → 跳过
+    if (!source) continue;
+
+    // 该账号没有 token → 标记跳过但不报错
+    const token = String(session?.token || "").trim();
+    if (!token) {
+      lastError = createHttpError(
+        `cloudtentacles 账号 ${sourceKey} 没有可用 token`,
+        { statusCode: 409, errorCode: "kuaishou_cloud_missing_cloud_token" }
+      );
+      continue;
+    }
+
+    // 找到可用账号
+    return {
+      baseUrl:
+        String(session.baseUrl || source.baseUrl || "").trim() ||
+        "https://123.207.217.176",
+      token,
+      deviceId:
+        String(session.deviceId || source.deviceId || "-").trim() || "-",
+      deviceType: Number(session.deviceType ?? source.deviceType ?? 0),
+      resolvedSourceKey: sourceKey,
+    };
+  }
+
+  // 所有备选都不可用
+  throw (
+    lastError ||
+    createHttpError(
+      "所有 cloudtentacles 备选账号均不可用，请先到平台配置完成登录校验",
+      { statusCode: 409, errorCode: "kuaishou_cloud_all_source_keys_exhausted" }
+    )
+  );
+}
+
 export async function ensureTaskClaimLink(task) {
   const tokenStatus = String(task?.primary_claim_token_status || "").trim();
   const token = String(
@@ -292,8 +356,9 @@ export async function prepareKuaishouCloudFulfillmentTask(task, options = {}) {
     };
   }
 
-  const cloudContext = resolvePersistedCloudtentaclesContext(
-    flow.binding.cloudSourceKey || "default"
+  const cloudContext = resolvePersistedCloudtentaclesContextWithFallback(
+    flow.binding.cloudSourceKey || "default",
+    flow.binding.cloudSourceKeyFallbacks || []
   );
   const [knapsack, skuList] = await Promise.all([
     getCloudtentaclesKnapsack(cloudContext),
@@ -395,6 +460,7 @@ export async function prepareKuaishouCloudFulfillmentTask(task, options = {}) {
       ...flowWithResolvedBinding,
       binding: {
         ...flowWithResolvedBinding.binding,
+        resolvedSourceKey: cloudContext.resolvedSourceKey,
         vnKey: preparedBinding.vnKey,
         prepareStatus: "ready",
         vnId: preparedBinding.vnId,
@@ -488,8 +554,11 @@ export async function refreshKuaishouCloudTaskBindUrl(task, options = {}) {
     });
   }
 
-  const cloudContext = resolvePersistedCloudtentaclesContext(
-    flow.binding.cloudSourceKey || "default"
+  const effectiveSourceKey =
+    flow.binding.resolvedSourceKey || flow.binding.cloudSourceKey || "default";
+  const cloudContext = resolvePersistedCloudtentaclesContextWithFallback(
+    effectiveSourceKey,
+    flow.binding.cloudSourceKeyFallbacks || []
   );
   const oldVnKey = flow.binding.vnKey;
   const oldVnId = flow.binding.vnId;
@@ -851,8 +920,11 @@ export async function refreshKuaishouCloudTaskRoleInfo(task, options = {}) {
     }
   }
 
-  const cloudContext = resolvePersistedCloudtentaclesContext(
-    flow.binding.cloudSourceKey || "default"
+  const effectiveSourceKey =
+    flow.binding.resolvedSourceKey || flow.binding.cloudSourceKey || "default";
+  const cloudContext = resolvePersistedCloudtentaclesContextWithFallback(
+    effectiveSourceKey,
+    flow.binding.cloudSourceKeyFallbacks || []
   );
   const bindInfoResult = await getCloudtentaclesBindInfo({
     ...cloudContext,
@@ -925,8 +997,11 @@ export async function dispatchKuaishouCloudFulfillmentTask(task, options = {}) {
   const now = nowIso();
   const taskContext = parseTaskContext(task);
   const flow = normalizeKuaishouCloudFlow(taskContext.kuaishouCloudFulfillment);
-  const cloudContext = resolvePersistedCloudtentaclesContext(
-    flow.binding.cloudSourceKey || "default"
+  const effectiveSourceKey =
+    flow.binding.resolvedSourceKey || flow.binding.cloudSourceKey || "default";
+  const cloudContext = resolvePersistedCloudtentaclesContextWithFallback(
+    effectiveSourceKey,
+    flow.binding.cloudSourceKeyFallbacks || []
   );
 
   if (!flow.binding.skuId || !flow.binding.vnId || !flow.binding.vnPhone) {
@@ -1054,8 +1129,11 @@ export async function returnKuaishouCloudFulfillmentTask(task, options = {}) {
   const now = nowIso();
   const taskContext = parseTaskContext(task);
   const flow = normalizeKuaishouCloudFlow(taskContext.kuaishouCloudFulfillment);
-  const cloudContext = resolvePersistedCloudtentaclesContext(
-    flow.binding.cloudSourceKey || "default"
+  const effectiveSourceKey =
+    flow.binding.resolvedSourceKey || flow.binding.cloudSourceKey || "default";
+  const cloudContext = resolvePersistedCloudtentaclesContextWithFallback(
+    effectiveSourceKey,
+    flow.binding.cloudSourceKeyFallbacks || []
   );
 
   if (!flow.binding.vnId || !flow.binding.vnKey) {
@@ -1561,3 +1639,16 @@ function isClaimExpired(expiredAt) {
   const timestamp = new Date(expiredAt).getTime();
   return Number.isFinite(timestamp) && timestamp <= Date.now();
 }
+
+function normalizeStringArray(value) {
+  if (Array.isArray(value)) {
+    return value.map((v) => String(v || "").trim()).filter(Boolean);
+  }
+  if (typeof value === "string") {
+    return value
+      .split(",")
+      .map((v) => v.trim())
+      .filter(Boolean);
+  }
+  return [];
+}
diff --git a/apps/backend/src/services/order/kuaishou-cloud-fulfillment-config-service.js b/apps/backend/src/services/order/kuaishou-cloud-fulfillment-config-service.js
index 07bafb4b..06c61173 100644
--- a/apps/backend/src/services/order/kuaishou-cloud-fulfillment-config-service.js
+++ b/apps/backend/src/services/order/kuaishou-cloud-fulfillment-config-service.js
@@ -1,174 +1,227 @@
-import fs from 'node:fs'
-import path from 'node:path'
+import fs from "node:fs";
+import path from "node:path";
 
-import { PROJECT_ROOT } from '../../config/runtime.js'
-import { resolveKuaishouEticketShopConfig } from '../platforms/kuaishou-eticket/source-config-service.js'
+import { PROJECT_ROOT } from "../../config/runtime.js";
+import { resolveKuaishouEticketShopConfig } from "../platforms/kuaishou-eticket/source-config-service.js";
 
-const KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH = path.join(PROJECT_ROOT, 'data', 'kuaishou-cloud-fulfillment.json')
+const KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH = path.join(
+  PROJECT_ROOT,
+  "data",
+  "kuaishou-cloud-fulfillment.json"
+);
 
 export function getKuaishouCloudFulfillmentFilePath() {
-  return KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH
+  return KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH;
 }
 
 export function getKuaishouCloudFulfillmentConfig() {
-  return loadKuaishouCloudFulfillmentConfigFromFile()
+  return loadKuaishouCloudFulfillmentConfigFromFile();
 }
 
 export function saveKuaishouCloudFulfillmentConfig(rawValue) {
-  const normalized = normalizeKuaishouCloudFulfillmentConfig(rawValue)
-  fs.mkdirSync(path.dirname(KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH), { recursive: true })
+  const normalized = normalizeKuaishouCloudFulfillmentConfig(rawValue);
+  fs.mkdirSync(path.dirname(KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH), {
+    recursive: true,
+  });
   fs.writeFileSync(
     KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH,
     `${JSON.stringify(normalized, null, 2)}\n`,
-    'utf8',
-  )
-  return normalized
+    "utf8"
+  );
+  return normalized;
 }
 
 export function mapKuaishouCloudFulfillmentItemsToBindings(config = {}) {
-  const items = Array.isArray(config.items) ? config.items : []
+  const items = Array.isArray(config.items) ? config.items : [];
 
   return items
     .filter((item) => item && item.enabled !== false)
     .map((item) => ({
-      provider: String(item.provider || '91kaquan').trim() || '91kaquan',
-      platform: String(item.platform || 'kuaishou').trim() || 'kuaishou',
-      shopId: String(item.shopId || '').trim(),
-      skuCode: String(item.internalSkuCode || '').trim(),
-      skuName: String(item.internalSkuName || '').trim(),
-      profileKey: 'kuaishou_ct_assisted',
+      provider: String(item.provider || "91kaquan").trim() || "91kaquan",
+      platform: String(item.platform || "kuaishou").trim() || "kuaishou",
+      shopId: String(item.shopId || "").trim(),
+      skuCode: String(item.internalSkuCode || "").trim(),
+      skuName: String(item.internalSkuName || "").trim(),
+      profileKey: "kuaishou_ct_assisted",
       enabled: item.enabled !== false,
       priority: normalizePriority(item.priority),
       config: {
-        flowType: 'kuaishou_cloud_fulfillment',
-        configId: String(item.id || '').trim(),
+        flowType: "kuaishou_cloud_fulfillment",
+        configId: String(item.id || "").trim(),
         cloudtentacles: {
-          cloudSourceKey: String(item.cloudSourceKey || 'default').trim() || 'default',
+          cloudSourceKey:
+            String(item.cloudSourceKey || "default").trim() || "default",
+          cloudSourceKeyFallbacks: Array.isArray(item.cloudSourceKeyFallbacks)
+            ? item.cloudSourceKeyFallbacks
+            : [],
           skuId: normalizePositiveInteger(item.cloudSkuId),
-          skuName: String(item.cloudSkuName || '').trim(),
-          vnKey: '1',
+          skuName: String(item.cloudSkuName || "").trim(),
+          vnKey: "1",
           autoBuyEnabled: item.autoBuyEnabled !== false,
           minAssetReserve: normalizeNonNegativeInteger(item.minAssetReserve, 0),
-          autoReturnNumberAfterDispatch: item.autoReturnNumberAfterDispatch === true,
+          autoReturnNumberAfterDispatch:
+            item.autoReturnNumberAfterDispatch === true,
         },
         kuaishouConsume: {
-          shopId: String(item.kuaishouConsumeShopId || '').trim(),
-          shopName: String(item.kuaishouConsumeShopName || '').trim(),
+          shopId: String(item.kuaishouConsumeShopId || "").trim(),
+          shopName: String(item.kuaishouConsumeShopName || "").trim(),
           autoConsumeAfterDispatch: item.autoConsumeAfterDispatch === true,
         },
-        notes: String(item.notes || '').trim(),
+        notes: String(item.notes || "").trim(),
       },
       match: {
-        externalSkuCode: String(item.externalSkuCode || '').trim(),
-        externalItemId: String(item.externalItemId || '').trim(),
-        externalSkuName: String(item.externalSkuName || '').trim(),
+        externalSkuCode: String(item.externalSkuCode || "").trim(),
+        externalItemId: String(item.externalItemId || "").trim(),
+        externalSkuName: String(item.externalSkuName || "").trim(),
         config: {
-          resolvedSkuName: String(item.resolvedSkuName || item.internalSkuName || '').trim(),
+          resolvedSkuName: String(
+            item.resolvedSkuName || item.internalSkuName || ""
+          ).trim(),
         },
       },
     }))
-    .filter((item) => item.skuCode && (item.match.externalSkuCode || item.match.externalItemId || item.match.externalSkuName))
+    .filter(
+      (item) =>
+        item.skuCode &&
+        (item.match.externalSkuCode ||
+          item.match.externalItemId ||
+          item.match.externalSkuName)
+    );
 }
 
 function loadKuaishouCloudFulfillmentConfigFromFile() {
   if (!fs.existsSync(KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH)) {
-    return normalizeKuaishouCloudFulfillmentConfig({})
+    return normalizeKuaishouCloudFulfillmentConfig({});
   }
 
   try {
-    const rawText = fs.readFileSync(KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH, 'utf8')
-    const parsed = JSON.parse(rawText)
-    return normalizeKuaishouCloudFulfillmentConfig(parsed)
+    const rawText = fs.readFileSync(
+      KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH,
+      "utf8"
+    );
+    const parsed = JSON.parse(rawText);
+    return normalizeKuaishouCloudFulfillmentConfig(parsed);
   } catch {
-    return normalizeKuaishouCloudFulfillmentConfig({})
+    return normalizeKuaishouCloudFulfillmentConfig({});
   }
 }
 
 function normalizeKuaishouCloudFulfillmentConfig(rawValue) {
-  const source = isPlainObject(rawValue) ? rawValue : {}
+  const source = isPlainObject(rawValue) ? rawValue : {};
   return {
     enabled: source.enabled !== false,
     items: Array.isArray(source.items)
-      ? source.items.map((item) => normalizeKuaishouCloudFulfillmentItem(item)).filter(Boolean)
+      ? source.items
+          .map((item) => normalizeKuaishouCloudFulfillmentItem(item))
+          .filter(Boolean)
       : [],
-  }
+  };
 }
 
 function normalizeKuaishouCloudFulfillmentItem(rawValue) {
   if (!isPlainObject(rawValue)) {
-    return null
+    return null;
   }
 
-  const internalSkuCode = String(rawValue.internalSkuCode || '').trim()
-  const cloudSkuId = normalizePositiveInteger(rawValue.cloudSkuId)
-  const externalSkuCode = String(rawValue.externalSkuCode || '').trim()
-  const externalItemId = String(rawValue.externalItemId || '').trim()
-  const externalSkuName = String(rawValue.externalSkuName || '').trim()
-  const kuaishouConsumeShopId = String(rawValue.kuaishouConsumeShopId || '').trim()
-  const kuaishouConsumeShopName = String(rawValue.kuaishouConsumeShopName || '').trim()
+  const internalSkuCode = String(rawValue.internalSkuCode || "").trim();
+  const cloudSkuId = normalizePositiveInteger(rawValue.cloudSkuId);
+  const externalSkuCode = String(rawValue.externalSkuCode || "").trim();
+  const externalItemId = String(rawValue.externalItemId || "").trim();
+  const externalSkuName = String(rawValue.externalSkuName || "").trim();
+  const kuaishouConsumeShopId = String(
+    rawValue.kuaishouConsumeShopId || ""
+  ).trim();
+  const kuaishouConsumeShopName = String(
+    rawValue.kuaishouConsumeShopName || ""
+  ).trim();
   const kuaishouShopConfig = resolveKuaishouEticketShopConfig({
     shopId: kuaishouConsumeShopId,
     shopName: kuaishouConsumeShopName,
-  })
+  });
 
   if (!internalSkuCode) {
-    return null
+    return null;
   }
 
   if (!cloudSkuId) {
-    return null
+    return null;
   }
 
   if (!externalSkuCode && !externalItemId && !externalSkuName) {
-    return null
+    return null;
   }
 
   return {
     id: String(rawValue.id || internalSkuCode).trim() || internalSkuCode,
     enabled: rawValue.enabled !== false,
     priority: normalizePriority(rawValue.priority),
-    provider: String(rawValue.provider || '91kaquan').trim() || '91kaquan',
-    platform: String(rawValue.platform || 'kuaishou').trim() || 'kuaishou',
-    shopId: String(rawValue.shopId || '').trim(),
+    provider: String(rawValue.provider || "91kaquan").trim() || "91kaquan",
+    platform: String(rawValue.platform || "kuaishou").trim() || "kuaishou",
+    shopId: String(rawValue.shopId || "").trim(),
     internalSkuCode,
-    internalSkuName: String(rawValue.internalSkuName || '').trim() || internalSkuCode,
+    internalSkuName:
+      String(rawValue.internalSkuName || "").trim() || internalSkuCode,
     externalSkuCode,
     externalItemId,
     externalSkuName,
-    resolvedSkuName: String(rawValue.resolvedSkuName || rawValue.internalSkuName || '').trim(),
-    cloudSourceKey: String(rawValue.cloudSourceKey || 'default').trim() || 'default',
+    resolvedSkuName: String(
+      rawValue.resolvedSkuName || rawValue.internalSkuName || ""
+    ).trim(),
+    cloudSourceKey:
+      String(rawValue.cloudSourceKey || "default").trim() || "default",
+    cloudSourceKeyFallbacks: normalizeStringArray(
+      rawValue.cloudSourceKeyFallbacks
+    ),
     cloudSkuId,
-    cloudSkuName: String(rawValue.cloudSkuName || '').trim(),
-    vnKey: '1',
+    cloudSkuName: String(rawValue.cloudSkuName || "").trim(),
+    vnKey: "1",
     autoBuyEnabled: rawValue.autoBuyEnabled !== false,
     minAssetReserve: normalizeNonNegativeInteger(rawValue.minAssetReserve, 0),
-    autoReturnNumberAfterDispatch: rawValue.autoReturnNumberAfterDispatch === true,
+    autoReturnNumberAfterDispatch:
+      rawValue.autoReturnNumberAfterDispatch === true,
     autoConsumeAfterDispatch: rawValue.autoConsumeAfterDispatch === true,
-    kuaishouConsumeShopId: String(kuaishouShopConfig?.shopId || kuaishouConsumeShopId).trim(),
-    kuaishouConsumeShopName: String(kuaishouShopConfig?.kshopName || kuaishouConsumeShopName).trim(),
-    notes: String(rawValue.notes || '').trim(),
-  }
+    kuaishouConsumeShopId: String(
+      kuaishouShopConfig?.shopId || kuaishouConsumeShopId
+    ).trim(),
+    kuaishouConsumeShopName: String(
+      kuaishouShopConfig?.kshopName || kuaishouConsumeShopName
+    ).trim(),
+    notes: String(rawValue.notes || "").trim(),
+  };
 }
 
 function normalizePositiveInteger(value) {
-  const parsed = Number(value)
-  return Number.isInteger(parsed) && parsed > 0 ? parsed : 0
+  const parsed = Number(value);
+  return Number.isInteger(parsed) && parsed > 0 ? parsed : 0;
 }
 
 function normalizeNonNegativeInteger(value, fallback) {
-  const parsed = Number(value)
-  return Number.isInteger(parsed) && parsed >= 0 ? parsed : fallback
+  const parsed = Number(value);
+  return Number.isInteger(parsed) && parsed >= 0 ? parsed : fallback;
 }
 
 function normalizePriority(value) {
-  const parsed = Number(value)
+  const parsed = Number(value);
   if (!Number.isFinite(parsed)) {
-    return 100
+    return 100;
   }
 
-  return Math.max(1, Math.round(parsed))
+  return Math.max(1, Math.round(parsed));
+}
+function isPlainObject(value) {
+  return Object.prototype.toString.call(value) === "[object Object]";
 }
 
-function isPlainObject(value) {
-  return Object.prototype.toString.call(value) === '[object Object]'
+function normalizeStringArray(value) {
+  if (Array.isArray(value)) {
+    return value.map((v) => String(v || "").trim()).filter(Boolean);
+  }
+  // 兼容旧格式：字符串用逗号分隔
+  if (typeof value === "string") {
+    return value
+      .split(",")
+      .map((v) => v.trim())
+      .filter(Boolean);
+  }
+  return [];
 }
diff --git a/apps/backend/src/types/admin-write-inputs.js b/apps/backend/src/types/admin-write-inputs.js
index 12d48f77..65b80aae 100644
--- a/apps/backend/src/types/admin-write-inputs.js
+++ b/apps/backend/src/types/admin-write-inputs.js
@@ -82,6 +82,7 @@ export {};
  *   externalSkuName?: string
  *   resolvedSkuName?: string
  *   cloudSourceKey?: string
+ *   cloudSourceKeyFallbacks?: string[]
  *   cloudSkuId?: number | string
  *   cloudSkuName?: string
  *   vnKey?: string