diff --git a/IRaCIS.Core.Application/Helper/OSSService.cs b/IRaCIS.Core.Application/Helper/OSSService.cs
index 6138d2cfc..2f084d214 100644
--- a/IRaCIS.Core.Application/Helper/OSSService.cs
+++ b/IRaCIS.Core.Application/Helper/OSSService.cs
@@ -190,7 +190,7 @@ public class OSSService : IOSSService
     /// <returns></returns>
     public async Task<string> UploadToOSSAsync(Stream fileStream, string oosFolderPath, string fileRealName, bool isFileNameAddGuid = true)
     {
-        GetObjectStoreTempToken();
+        BackBatchGetToken();
 
         var ossRelativePath = isFileNameAddGuid ? $"{oosFolderPath}/{Guid.NewGuid()}_{fileRealName}" : $"{oosFolderPath}/{fileRealName}";
 
@@ -280,6 +280,37 @@ public class OSSService : IOSSService
     }
 
 
+    //后端批量上传 或者下载，不每个文件获取临时token
+    private void BackBatchGetToken()
+    {
+        if (ObjectStoreServiceOptions.ObjectStoreUse == "AliyunOSS")
+        {
+            if(AliyunOSSTempToken == null)
+            {
+                GetObjectStoreTempToken();
+            }
+            //token 过期了
+            else if (AliyunOSSTempToken.Expiration.AddSeconds(10) <= DateTime.Now)
+            {
+                GetObjectStoreTempToken();
+            }
+
+               
+        }      
+        else if (ObjectStoreServiceOptions.ObjectStoreUse == "AWS")
+        {
+            if (AWSTempToken == null)
+            {
+                GetObjectStoreTempToken();
+            }
+            //token 过期了
+            else if (AWSTempToken.Expiration?.AddSeconds(10) <= DateTime.Now)
+            {
+                GetObjectStoreTempToken();
+            }
+        }
+    }
+
 
     /// <summary>
     /// oosFolderPath  不要 "/ "开头   应该： TempFolder/ChildFolder
@@ -291,7 +322,7 @@ public class OSSService : IOSSService
     /// <exception cref="BusinessValidationFailedException"></exception>
     public async Task<string> UploadToOSSAsync(string localFilePath, string oosFolderPath, bool isFileNameAddGuid = true)
     {
-        GetObjectStoreTempToken();
+        BackBatchGetToken();
 
         var localFileName = Path.GetFileName(localFilePath);
 
@@ -361,22 +392,7 @@ public class OSSService : IOSSService
 
     public async Task DownLoadFromOSSAsync(string ossRelativePath, string localFilePath)
     {
-        if (isFirstCall)
-        {
-            GetObjectStoreTempToken();
-            isFirstCall = false;
-        }
-        else
-        {
-            //判断是否过期了
-            if (ObjectStoreServiceOptions.ObjectStoreUse == "AliyunOSS")
-            {
-                if (AliyunOSSTempToken != null && AliyunOSSTempToken.Expiration <= DateTime.Now)
-                {
-                    GetObjectStoreTempToken();
-                }
-            }
-        }
+        BackBatchGetToken();
 
         ossRelativePath = ossRelativePath.TrimStart('/');
         try
@@ -394,7 +410,7 @@ public class OSSService : IOSSService
                 // 将下载的文件流保存到本地文件
                 using (var fs = File.OpenWrite(localFilePath))
                 {
-                   await result.Content.CopyToAsync(fs);
+                    await result.Content.CopyToAsync(fs);
                 }
 
             }
@@ -1014,25 +1030,9 @@ public class OSSService : IOSSService
         }
     }
 
-    private bool isFirstCall = true;
     public async Task<long> GetObjectSizeAsync(string sourcePath)
     {
-        if (isFirstCall)
-        {
-            GetObjectStoreTempToken();
-            isFirstCall = false;
-        }
-        else
-        {
-            //判断是否过期了
-            if (ObjectStoreServiceOptions.ObjectStoreUse == "AliyunOSS")
-            {
-                if(AliyunOSSTempToken != null && AliyunOSSTempToken.Expiration <= DateTime.Now)
-                {
-                    GetObjectStoreTempToken();
-                }
-            }
-        }
+        BackBatchGetToken();
 
 
         var objectkey = sourcePath.Trim('/');
@@ -1046,7 +1046,7 @@ public class OSSService : IOSSService
             var key = HttpUtility.UrlDecode(objectkey);
             var metadata = _ossClient.GetObjectMetadata(aliConfig.BucketName, key);
 
-            long fileSize = metadata?.ContentLength??0; // 文件大小（字节）
+            long fileSize = metadata?.ContentLength ?? 0; // 文件大小（字节）
 
             return fileSize;
         }