diff --git a/utils/entity/RouMan.py b/utils/entity/RouMan.py
index be8d713..f57652a 100644
--- a/utils/entity/RouMan.py
+++ b/utils/entity/RouMan.py
@@ -145,13 +145,12 @@ class comicEntity:
             is_next = cls.comicChapterDownload(chapter_url)
         comicInfo.nextInfoToImgChapter()
         #下载完成后, 开始解密图片
-        if scramble:
+        chapter_dir = comicInfo.getDirComicChapter()
+        if scramble and os.path.exists(chapter_dir):
             #获取章节图片路径
-            chapter_dir = comicInfo.getDirComicChapter()
             dirs = os.listdir(chapter_dir)
             for img in dirs:
-                isScramble = str(img).startswith("scramble=")
-                if isScramble:
+                if img.startswith("scramble="):
                     c_path = os.path.join(chapter_dir, img)
                     #imageUtils.getScrambleImage(c_path)
                     imageUtils.encode_scramble_image(c_path)