diff --git a/apps/backend/src/services/platforms/douyin-mashida/order-mapper.test.ts b/apps/backend/src/services/platforms/douyin-mashida/order-mapper.test.ts
index 607e63fc..fe266290 100644
--- a/apps/backend/src/services/platforms/douyin-mashida/order-mapper.test.ts
+++ b/apps/backend/src/services/platforms/douyin-mashida/order-mapper.test.ts
@@ -7,6 +7,7 @@ import {
   buildDouyinMashidaSourceEvent,
   extractDouyinMashidaSubOrderId,
   mapDouyinMashidaOrderState,
+  parseDouyinMashidaTimeIso,
   parseEpochSecondsIso,
   resolveDouyinMashidaParentOrderId,
   resolveDouyinMashidaReceiptOrderId,
@@ -153,3 +154,72 @@ test('秒级时间戳转 ISO：非法值返回空串', () => {
   assert.equal(parseEpochSecondsIso('abc'), '')
   assert.equal(parseEpochSecondsIso(null), '')
 })
+
+test('平台时间两种形态都要认：秒级时间戳 与 "YYYY-MM-DD HH:mm:ss"（真实联调发现）', () => {
+  // 消息推送里是秒级 Integer
+  assert.equal(parseDouyinMashidaTimeIso(1630373504), new Date(1630373504 * 1000).toISOString())
+
+  // order.orderDetail 返回的是北京时间字符串（文档没写，实测才发现）
+  assert.equal(parseDouyinMashidaTimeIso('2026-10-09 12:28:02'), '2026-10-09T04:28:02.000Z')
+  assert.equal(parseDouyinMashidaTimeIso('2026-10-09T12:28:02'), '2026-10-09T04:28:02.000Z')
+
+  // 平台用 epoch 0 表示"无"
+  assert.equal(parseDouyinMashidaTimeIso('1970-01-01 08:00:00'), '')
+  assert.equal(parseDouyinMashidaTimeIso('0'), '')
+  assert.equal(parseDouyinMashidaTimeIso(''), '')
+  assert.equal(parseDouyinMashidaTimeIso('not-a-time'), '')
+})
+
+test('真实 order.orderDetail 形态能正确映射（pay_time 为字符串 + 子单号等于父单号）', () => {
+  const realDetail = {
+    order_id: '6930310175251856483',
+    order_status: 3,
+    order_type: 5,
+    biz: 11,
+    shop_id: 305760014,
+    shop_name: '向日葵游戏交易店',
+    order_amount: 100,
+    pay_amount: 100,
+    pay_time: '2026-10-09 12:28:02',
+    create_time: '2026-10-09 12:28:08',
+    finish_time: '1970-01-01 08:00:00',
+    doudian_open_id: '1@#c6oZFIm15Q1cgcYCu+xGhx+Shv/+JlJlOzcmtRHhaPZi1aYjK7rUOza7AU4lr2i5xOuT',
+    post_receiver: '',
+    post_tel: '',
+    buyer_words: '',
+    seller_words: '',
+    sku_order_list: [
+      {
+        code: '幸运币2个',
+        goods_price: 100,
+        item_num: 1,
+        order_amount: 100,
+        order_id: '6930310175251856483',
+        product_id: 3847255376114352600,
+        product_name: '【测试专用】和平精英皮肤小店入口出售返场吃鸡皮肤浪漫天命专用',
+        sku_id: 3383719439799589,
+      },
+    ],
+  }
+
+  const event = buildDouyinMashidaSourceEvent({
+    // p_id 用字符串：写成数字字面量在测试里就会先被 JS 截断（正是生产里那个精度坑）
+    message: { p_id: '6930310175251856483', order_status: 2, pay_amount: 100 },
+    detail: realDetail,
+  })
+
+  assert.equal(event.platformOrderId, '6930310175251856483')
+  assert.equal(event.shopId, '305760014')
+  assert.equal(event.shopName, '向日葵游戏交易店')
+  assert.equal(event.totalAmount, 100)
+  assert.equal(event.orderStatus, 'paid')
+  assert.equal(event.payStatus, 'paid')
+  // 关键是这个：字符串 pay_time 也要拿到真实支付时间，而不是退化成 receivedAt
+  assert.equal(event.paidAt, '2026-10-09T04:28:02.000Z')
+  assert.equal(event.items.length, 1)
+
+  const [item] = event.items as Array<Record<string, unknown>>
+  assert.equal(item.itemId, '6930310175251856483')
+  assert.equal(item.skuCode, '幸运币2个')
+  assert.equal(item.quantity, 1)
+})
diff --git a/apps/backend/src/services/platforms/douyin-mashida/order-mapper.ts b/apps/backend/src/services/platforms/douyin-mashida/order-mapper.ts
index 395eeb16..a500f0e5 100644
--- a/apps/backend/src/services/platforms/douyin-mashida/order-mapper.ts
+++ b/apps/backend/src/services/platforms/douyin-mashida/order-mapper.ts
@@ -95,7 +95,7 @@ export function buildDouyinMashidaSourceEvent(input: {
   const detail = input.detail || {}
   const parentOrderId = resolveDouyinMashidaParentOrderId(message, detail)
   const state = mapDouyinMashidaOrderState(detail.order_status ?? message.order_status)
-  const paidAt = parseEpochSecondsIso(detail.pay_time ?? message.pay_time)
+  const paidAt = parseDouyinMashidaTimeIso(detail.pay_time ?? message.pay_time)
   const receivedAt = input.receivedAt || nowIso()
 
   return {
@@ -198,6 +198,42 @@ export function parseEpochSecondsIso(value: unknown): string {
   return new Date(seconds * 1000).toISOString()
 }
 
+/**
+ * 平台时间字段 → ISO。
+ *
+ * ⚠️ 真实联调发现：`order.orderDetail` 返回的 `pay_time` 是**格式化字符串**
+ * `"2026-10-09 12:28:02"`（北京时间），而**消息推送**里 `pay_time` 是秒级 Integer。
+ * 文档只写了 Integer，照文档实现会把真实支付时间解析成空、退化成"收到时间"。
+ * 所以两种形态都要认：
+ *   - 纯数字 → 按秒级时间戳
+ *   - `YYYY-MM-DD HH:mm:ss`（含 T 分隔）→ 按 **+08:00** 解析
+ * `"1970-01-01 08:00:00"`（平台表示"无"）与非法值一律返回空串。
+ */
+export function parseDouyinMashidaTimeIso(value: unknown): string {
+  const text = String(value ?? '').trim()
+  if (!text || text === '0') {
+    return ''
+  }
+
+  if (/^\d+$/.test(text)) {
+    return parseEpochSecondsIso(text)
+  }
+
+  const matched = /^(\d{4})-(\d{2})-(\d{2})[ T](\d{2}):(\d{2}):(\d{2})$/.exec(text)
+  if (!matched) {
+    return ''
+  }
+
+  const [, year, month, day, hour, minute, second] = matched
+  const date = new Date(`${year}-${month}-${day}T${hour}:${minute}:${second}+08:00`)
+  const timestamp = date.getTime()
+  // 平台用 "1970-01-01 08:00:00"（即 epoch 0）表示"无"
+  if (!Number.isFinite(timestamp) || timestamp <= 0) {
+    return ''
+  }
+  return date.toISOString()
+}
+
 function normalizeFen(value: unknown): number {
   const amount = Number(value)
   return Number.isFinite(amount) && amount > 0 ? Math.round(amount) : 0