diff --git a/intc-modules/intc-weixin/src/main/java/com/intc/weixin/service/impl/PayOrderBusinessServiceImpl.java b/intc-modules/intc-weixin/src/main/java/com/intc/weixin/service/impl/PayOrderBusinessServiceImpl.java
index d6361ed..71fdc9c 100644
--- a/intc-modules/intc-weixin/src/main/java/com/intc/weixin/service/impl/PayOrderBusinessServiceImpl.java
+++ b/intc-modules/intc-weixin/src/main/java/com/intc/weixin/service/impl/PayOrderBusinessServiceImpl.java
@@ -336,16 +336,18 @@ public class PayOrderBusinessServiceImpl implements PayOrderBusinessService {
             return;
         }
 
-        // 批量更新设备到期时间
+        // 批量更新设备到期时间（忽略租户过滤，因为设备可能由IOT模块写入，租户ID可能不一致）
         for (PayDevice payDevice : payDevices) {
-            Device device = deviceMapper.selectOne(
-                new LambdaQueryWrapper<Device>()
-                    .eq(Device::getSerialNum, payDevice.getSerialNum())
-                    .eq(Device::getUserId, payDevice.getUserId())
+            // 仅通过 serialNum 查找设备，不限制 userId，因为允许代充（支付者可能与设备所有者不同）
+            Device device = TenantHelper.ignore(() ->
+                deviceMapper.selectOne(
+                    new LambdaQueryWrapper<Device>()
+                        .eq(Device::getSerialNum, payDevice.getSerialNum())
+                )
             );
 
             if (device == null) {
-                log.warn("设备不存在: serialNum={}, userId={}", payDevice.getSerialNum(), payDevice.getUserId());
+                log.warn("设备不存在: serialNum={}", payDevice.getSerialNum());
                 continue;
             }