diff --git a/IRaCIS.Core.API/Controllers/UploadDownLoadController.cs b/IRaCIS.Core.API/Controllers/UploadDownLoadController.cs
index c4f742047..77b57270c 100644
--- a/IRaCIS.Core.API/Controllers/UploadDownLoadController.cs
+++ b/IRaCIS.Core.API/Controllers/UploadDownLoadController.cs
@@ -1,4 +1,5 @@
 using AutoMapper;
+using DocumentFormat.OpenXml.ExtendedProperties;
 using ExcelDataReader;
 using FellowOakDicom;
 using FellowOakDicom.Imaging;
@@ -904,15 +905,45 @@ namespace IRaCIS.Core.API.Controllers
             var downloadInfo = (SubejctVisitDownload)rusult.OtherData;
 
 
-            long receivedsize = 0;
+            long receivedSize = 0;
             long receivedCount = 0;
-
             long totalSize = downloadInfo.ImageSize;
-            long toTalCount = downloadInfo.ImageCount;
+            long totalCount = downloadInfo.ImageCount;
 
             var abortToken = HttpContext.RequestAborted;
+
+            // -------- SignalR 节流参数 --------
+            var notifyInterval = TimeSpan.FromSeconds(1);
             var lastNotify = DateTime.UtcNow;
 
+
+            async Task NotifyProgressAsync(bool force = false)
+            {
+                if (!force && DateTime.UtcNow - lastNotify < notifyInterval)
+                    return;
+
+                lastNotify = DateTime.UtcNow;
+
+                var progress = new
+                {
+                    CountPercent = totalCount > 0
+                        ? Math.Round(receivedCount * 100m / totalCount, 2).ToString() + "%"
+                        : "0%",
+
+                      SizePercent = totalSize > 0
+                        ? Math.Round(receivedSize * 100m / totalSize, 2).ToString() + "%"
+                        : "0%"
+                };
+
+                // 不阻塞下载流程
+                _ = _downLoadHub.Clients
+                    .User(_userInfo.IdentityUserId.ToString())
+                    .ReceivProgressAsync(
+                        inCommand.CurrentNoticeId,
+                        progress
+                    );
+            }
+
             Response.ContentType = "application/zip";
             Response.Headers["Content-Disposition"] = $"attachment; filename=Image_{ExportExcelConverterDate.DateTimeInternationalToString(DateTime.Now, _userInfo.TimeZoneId)}.zip";
             Response.Headers["Cache-Control"] = "no-store";
@@ -948,7 +979,7 @@ namespace IRaCIS.Core.API.Controllers
                             foreach (var instance in series.InstanceList)
                             {
                                 //当前完成大小
-                                receivedsize = receivedsize + instance.FileSize ?? 0;
+                                receivedSize = receivedSize + instance.FileSize ?? 0;
                                 receivedCount++;
 
                                 abortToken.ThrowIfCancellationRequested();
@@ -992,19 +1023,14 @@ namespace IRaCIS.Core.API.Controllers
                                 //await source.CopyToAsync(entryStream, 32 * 1024, abortToken);
 
 
-                                await _downLoadHub.Clients.User(_userInfo.IdentityUserId.ToString()).ReceivProgressAsync(inCommand.CurrentNoticeId,
-                                    (new
-                                    {
-                                        CountPercent = downloadInfo.ImageCount > 0 ? Math.Round(receivedCount * 100m / downloadInfo.ImageCount, 2) : 0m,
-                                        SizePercent = totalSize > 0 ? Math.Round(receivedsize * 100m / totalSize, 2) : 0m
-                                    }
-                                   ));
+                                await NotifyProgressAsync();
                             }
                         }
                     }
                 }
 
                 // 正常完成
+                await NotifyProgressAsync(true);
                 await _patientService.DownloadImageSuccess(downloadInfo.Id);
             }
             catch (OperationCanceledException)
@@ -1028,6 +1054,10 @@ namespace IRaCIS.Core.API.Controllers
 
         }
 
+
+
+
+
     }
 
 }
diff --git a/IRaCIS.Core.API/SignalRHub/UploadHub.cs b/IRaCIS.Core.API/SignalRHub/UploadHub.cs
index ba1fc6d35..57be38714 100644
--- a/IRaCIS.Core.API/SignalRHub/UploadHub.cs
+++ b/IRaCIS.Core.API/SignalRHub/UploadHub.cs
@@ -70,8 +70,8 @@ namespace IRaCIS.Core.API
     public class DownloadHub : Hub<IDownloadClient>
     {
 
-        public ILogger<UploadHub> _logger { get; set; }
-        public DownloadHub(ILogger<UploadHub> logger)
+        public ILogger<DownloadHub> _logger { get; set; }
+        public DownloadHub(ILogger<DownloadHub> logger)
         {
             _logger = logger;
         }