diff --git a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
index 209442b..4c05fef 100644
--- a/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
+++ b/src/N_m3u8DL-RE/DownloadManager/SimpleDownloadManager.cs
@@ -41,9 +41,13 @@ namespace N_m3u8DL_RE.DownloadManager
 
             var type = streamSpec.MediaType ?? Common.Enum.MediaType.VIDEO;
             var dirName = $"{NowDateTime:yyyy-MM-dd_HH-mm-ss}_{streamSpec.GroupId}_{streamSpec.Codecs}_{streamSpec.Language}";
+            //去除非法字符
+            dirName = ConvertUtil.GetValidFileName(dirName, filterSlash: true);
             var tmpDir = Path.Combine(DownloaderConfig.TmpDir ?? Environment.CurrentDirectory, dirName);
             var saveDir = DownloaderConfig.SaveDir ?? Environment.CurrentDirectory;
             var saveName = DownloaderConfig.SaveName != null ? $"{DownloaderConfig.SaveName}.{type}.{streamSpec.Language}" : dirName;
+            //去除非法字符
+            dirName = ConvertUtil.GetValidFileName(dirName, filterSlash: true);
             var headers = DownloaderConfig.Headers;
             var output = Path.Combine(saveDir, saveName + $".{streamSpec.Extension ?? "ts"}");
 
diff --git a/src/N_m3u8DL-RE/Util/ConvertUtil.cs b/src/N_m3u8DL-RE/Util/ConvertUtil.cs
index 02076c3..4cc675e 100644
--- a/src/N_m3u8DL-RE/Util/ConvertUtil.cs
+++ b/src/N_m3u8DL-RE/Util/ConvertUtil.cs
@@ -51,5 +51,20 @@ namespace N_m3u8DL_RE.Util
                 _ => throw new NotSupportedException($"{toFormat} not supported!")
             };
         }
+
+        public static string GetValidFileName(string input, string re = ".", bool filterSlash = false)
+        {
+            string title = input;
+            foreach (char invalidChar in Path.GetInvalidFileNameChars())
+            {
+                title = title.Replace(invalidChar.ToString(), re);
+            }
+            if (filterSlash)
+            {
+                title = title.Replace("/", re);
+                title = title.Replace("\\", re);
+            }
+            return title.Trim('.');
+        }
     }
 }