diff --git a/util/batch_rename.py b/util/batch_rename.py
new file mode 100644
index 0000000000000000000000000000000000000000..254a26342b30ab45072595726679e6baf053a3b5
--- /dev/null
+++ b/util/batch_rename.py
@@ -0,0 +1,56 @@
+import os
+import sys
+import re
+from os import path
+
+
+def check_lost():
+    # check {dir} {list_file}
+    
+    li1 = os.listdir(sys.argv[1])
+
+    co = open(sys.argv[2], encoding='utf-8').read()
+    li2 = set(re.findall(r'^\| (.+?\.epub) .+? \|', co, re.M))
+    #print(li2)
+
+    li = [it for it in li1 if it not in li2]
+
+    with open(sys.argv[2] + '.res.txt', 'w', encoding='utf-8') as f:
+        for it in li: f.write(it + '\n')
+
+def is_gbk(s):
+    assert len(s) == 1
+    try:
+        s.encode('gbk')
+        return True
+    except:
+        return False
+
+def filter_fname(s):
+    return ''.join([(ch if is_gbk(ch) else '-') for ch in s])
+
+
+def batch_rename():
+    # rename {dir}
+    dir = sys.argv[1]
+    files = os.listdir(dir)
+    
+    for f in files:
+        nf = filter_fname(f)
+        if f == nf: continue
+        print(nf)
+        f = path.join(dir, f)
+        nf = path.join(dir, nf)
+        os.rename(f, nf)
+
+def upload():
+    # upload {list_file} {dirname}
+    dir = sys.argv[2]
+    
+    li = open(sys.argv[1], encoding='utf-8').read().split('\n')[:-1]
+    
+    for it in li:
+        it = path.join(dir, it)
+        os.system(f'bdex upload "{it}" | tee -a "log.txt"')
+        
+batch_rename()
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