diff --git a/IRaCIS.Core.Application/Helper/OSSService.cs b/IRaCIS.Core.Application/Helper/OSSService.cs
index c8c63a73a..53bf6338a 100644
--- a/IRaCIS.Core.Application/Helper/OSSService.cs
+++ b/IRaCIS.Core.Application/Helper/OSSService.cs
@@ -145,6 +145,8 @@ public interface IOSSService
 
     public Task DeleteFromPrefix(string prefix);
 
+    List<string> GetRootFolderNames();
+
     public ObjectStoreDTO GetObjectStoreTempToken();
 }
 
@@ -526,6 +528,55 @@ public class OSSService : IOSSService
 
     }
 
+    /// <summary>
+    /// 获取所有根目录名称
+    /// </summary>
+    /// <returns></returns>
+    public List<string> GetRootFolderNames()
+    {
+        GetObjectStoreTempToken();
+        var aliConfig = ObjectStoreServiceOptions.AliyunOSS;
+        var _ossClient = new OssClient(RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? aliConfig.EndPoint : aliConfig.InternalEndpoint,
+                                        AliyunOSSTempToken.AccessKeyId,
+                                        AliyunOSSTempToken.AccessKeySecret,
+                                        AliyunOSSTempToken.SecurityToken);
+
+        List<string> rootFolders = new List<string>();
+        string nextMarker = null;
+
+        try
+        {
+            ObjectListing objectListing = null;
+            do
+            {
+                // 列出根目录下的对象和文件夹
+                 objectListing = _ossClient.ListObjects(new  Aliyun.OSS.ListObjectsRequest(aliConfig.BucketName)
+                {
+                  
+                    MaxKeys = 1000,
+                    Marker = nextMarker,
+                    Delimiter = "/"  // 使用分隔符来模拟文件夹
+                });
+
+                // 遍历 CommonPrefixes 获取根文件夹名称
+                foreach (var prefix in objectListing.CommonPrefixes)
+                {
+                    rootFolders.Add(prefix.TrimEnd('/')); // 去掉末尾的斜杠
+                }
+
+                // 设置 NextMarker 以获取下一页的数据
+                nextMarker = objectListing.NextMarker;
+
+            } while (objectListing.IsTruncated);
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"Error: {ex.Message}");
+        }
+
+        return rootFolders;
+    }
+
     /// <summary>
     /// 删除某个目录的文件
     /// </summary>
diff --git a/IRaCIS.Core.Application/IRaCIS.Core.Application.xml b/IRaCIS.Core.Application/IRaCIS.Core.Application.xml
index d72802c4c..689f44716 100644
--- a/IRaCIS.Core.Application/IRaCIS.Core.Application.xml
+++ b/IRaCIS.Core.Application/IRaCIS.Core.Application.xml
@@ -12977,6 +12977,12 @@
             <param name="trialId"></param>
             <returns></returns>
         </member>
+        <member name="M:IRaCIS.Core.Application.Service.TrialService.DeleteFolder">
+            <summary>
+            删除脏文件夹
+            </summary>
+            <returns></returns>
+        </member>
         <member name="M:IRaCIS.Core.Application.Service.TrialService.DeleteTrial(System.Guid,IRaCIS.Core.Infra.EFCore.IRepository)">
             <summary> 真删除项目  方便清理测试数据 </summary>
             <param name="trialId">临床试验项目Id</param>
@@ -13324,6 +13330,12 @@
             <returns></returns>
             <exception cref="T:IRaCIS.Core.Infrastructure.BusinessValidationFailedException"></exception>
         </member>
+        <member name="M:IRaCIS.Core.Application.Helper.OSSService.GetRootFolderNames">
+            <summary>
+            获取所有根目录名称
+            </summary>
+            <returns></returns>
+        </member>
         <member name="M:IRaCIS.Core.Application.Helper.OSSService.DeleteFromPrefix(System.String)">
             <summary>
             删除某个目录的文件
diff --git a/IRaCIS.Core.Application/Service/TrialSiteUser/TrialService.cs b/IRaCIS.Core.Application/Service/TrialSiteUser/TrialService.cs
index 3c1357226..ee56b27a9 100644
--- a/IRaCIS.Core.Application/Service/TrialSiteUser/TrialService.cs
+++ b/IRaCIS.Core.Application/Service/TrialSiteUser/TrialService.cs
@@ -1,7 +1,9 @@
-using IRaCIS.Application.Contracts;
+using DocumentFormat.OpenXml.Office2010.ExcelAc;
+using IRaCIS.Application.Contracts;
 using IRaCIS.Application.Interfaces;
 using IRaCIS.Core.Application.Filter;
 using IRaCIS.Core.Application.Helper;
+using IRaCIS.Core.Domain.Models;
 using IRaCIS.Core.Domain.Share;
 using IRaCIS.Core.Infrastructure;
 using Microsoft.AspNetCore.Authorization;
@@ -431,6 +433,23 @@ namespace IRaCIS.Core.Application.Service
             return ResponseOutput.Ok();
         }
 
+        /// <summary>
+        /// 删除OSS脏文件夹
+        /// </summary>
+        /// <returns></returns>
+        public async Task DeleteOSSFolder()
+        {
+            List<Guid> trialids = await _trialRepository.Select(x => x.Id).ToListAsync();
+            List<string> path=   _oSSService.GetRootFolderNames();
+            foreach (var item in path)
+            {
+                if (Guid.TryParse(item, out Guid folderId) && !trialids.Contains(folderId))
+                {
+                    await _oSSService.DeleteFromPrefix(item);
+                }
+            }
+        }
+
         /// <summary> 真删除项目  方便清理测试数据 </summary>
         /// <param name="trialId">临床试验项目Id</param>
         [AllowAnonymous]