diff --git a/IRaCIS.Core.Application/Service/Common/BackDownloadService.cs b/IRaCIS.Core.Application/Service/Common/BackDownloadService.cs
index 603b88601..05a2af38c 100644
--- a/IRaCIS.Core.Application/Service/Common/BackDownloadService.cs
+++ b/IRaCIS.Core.Application/Service/Common/BackDownloadService.cs
@@ -2,12 +2,14 @@
 using FellowOakDicom;
 using IRaCIS.Core.Application.Helper;
 using MassTransit;
+using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Mvc;
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
+using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using System.Web;
 using static IRaCIS.Core.Domain.Share.StaticData;
@@ -20,6 +22,7 @@ namespace IRaCIS.Core.Application.Service
     /// </summary>
     /// <param name="_trialRepository"></param>
     /// <param name="_oSSService"></param>
+    [AllowAnonymous]
     [ApiExplorerSettings(GroupName = "Common")]
     public class BackDownloadService(IRepository<Trial> _trialRepository, IOSSService _oSSService, IWebHostEnvironment _hostEnvironment) : BaseService
     {
@@ -73,13 +76,23 @@ namespace IRaCIS.Core.Application.Service
             }).FirstOrDefault();
 
 
+            var count = downloadInfo.VisitList.SelectMany(t => t.NoneDicomStudyList).SelectMany(t => t.FileList).Count();
+
             if (downloadInfo != null)
             {
 
                 var rootFolder = FileStoreHelper.GetDonwnloadImageFolder(_hostEnvironment);
 
+                // 获取无效字符（系统定义的）
+                string invalidChars = new string(Path.GetInvalidFileNameChars()) + new string(Path.GetInvalidPathChars());
+
+                // 用正则表达式替换所有非法字符为下划线或空字符
+                string pattern = $"[{Regex.Escape(invalidChars)}]";
+
+                var regexNo = Regex.Replace(downloadInfo.ResearchProgramNo, pattern, "_");
+
                 // 创建一个临时文件夹来存放文件
-                string trialFolderPath = Path.Combine(rootFolder, $"{downloadInfo.ResearchProgramNo}_{NewId.NextGuid()}");
+                string trialFolderPath = Path.Combine(rootFolder, $"{regexNo}_{NewId.NextGuid()}");
                 Directory.CreateDirectory(trialFolderPath);
 
                 foreach (var visitItem in downloadInfo.VisitList)
@@ -97,18 +110,6 @@ namespace IRaCIS.Core.Application.Service
                         Directory.CreateDirectory(siteFolderPath);
                     }
 
-                    //var subjectDicomFolderPath = Path.Combine(siteFolderPath, $"{visitItem.SubjectCode}_{visitItem.VisitName}_DICOM");
-                    //var subjectNoneDicomFolderPath = Path.Combine(siteFolderPath, $"{visitItem.SubjectCode}_{visitItem.VisitName}_Non-DICOM");
-
-                    //if (visitItem.NoneDicomStudyList.Count() > 0)
-                    //{
-                    //    Directory.CreateDirectory(subjectNoneDicomFolderPath);
-                    //}
-                    //if (visitItem.StudyList.Count() > 0)
-                    //{
-                    //    Directory.CreateDirectory(subjectDicomFolderPath);
-                    //}
-
                     #endregion
 
 
@@ -133,19 +134,21 @@ namespace IRaCIS.Core.Application.Service
                             }
                         }
 
-                        foreach (var noneDicomStudy in visitItem.NoneDicomStudyList)
+                       
+                    }
+
+                    foreach (var noneDicomStudy in visitItem.NoneDicomStudyList)
+                    {
+                        string studyNoneDicomFolderPath = Path.Combine(siteFolderPath, $"{visitItem.SubjectCode}_{visitItem.VisitName}_Non-DICOM", $"{noneDicomStudy.StudyCode}_{noneDicomStudy.ImageDate.ToString("yyyy-MM-dd")}_{noneDicomStudy.Modality}");
+
+                        Directory.CreateDirectory(studyNoneDicomFolderPath);
+
+                        foreach (var file in noneDicomStudy.FileList)
                         {
-                            string studyNoneDicomFolderPath = Path.Combine(siteFolderPath, $"{visitItem.SubjectCode}_{visitItem.VisitName}_Non-DICOM", $"{noneDicomStudy.StudyCode}_{noneDicomStudy.ImageDate.ToString("yyyy-MM-dd")}_{noneDicomStudy.Modality}");
+                            string destinationPath = Path.Combine(studyNoneDicomFolderPath, Path.GetFileName(file.FileName));
 
-                            Directory.CreateDirectory(studyNoneDicomFolderPath);
-
-                            foreach (var file in noneDicomStudy.FileList)
-                            {
-                                string destinationPath = Path.Combine(studyNoneDicomFolderPath, Path.GetFileName(file.FileName));
-
-                                //下载到当前目录
-                                await _oSSService.DownLoadFromOSSAsync(HttpUtility.UrlDecode(file.Path), destinationPath);
-                            }
+                            //下载到当前目录
+                            await _oSSService.DownLoadFromOSSAsync(HttpUtility.UrlDecode(file.Path), destinationPath);
                         }
                     }