diff --git a/src/WMS.Web.Domain/Services/SerialNumberService.cs b/src/WMS.Web.Domain/Services/SerialNumberService.cs
index 6fcb1adf..679a3c3d 100644
--- a/src/WMS.Web.Domain/Services/SerialNumberService.cs
+++ b/src/WMS.Web.Domain/Services/SerialNumberService.cs
@@ -361,7 +361,7 @@ namespace WMS.Web.Domain.Services
         public async Task<Result> BackRecord(BackRecord backRecord, LoginInDto loginInfo, bool isTransaction = true)
         {
             //获取序列号信息
-            var serialNumbers = backRecord.Details.Select(s => s.SerialNumbers).ToList();
+            var serialNumbers = backRecord.Details.SelectMany(s => s.SerialNumbers).ToList();
             var entityList = await _serialNumbersRepositories.GetEntityList(serialNumbers);
             var boxIds = entityList.Select(s => s.BoxId).ToList();
             var boxList = await _boxRepositories.GetEntityList(boxIds);