diff --git a/remove_lf_m3t.py b/remove_lf_m3t.py
new file mode 100644
index 0000000..0ca0cc8
--- /dev/null
+++ b/remove_lf_m3t.py
@@ -0,0 +1,67 @@
+import os
+
+
+def remove_lf(text: str) -> str:
+    texts = [i.lstrip() for i in text.replace("\\n", "\n").splitlines()]
+    return ''.join(texts)
+
+
+def process_m3t(m3t_path):
+    lines = []
+    line_num = 0
+    for line in open(m3t_path, "r", encoding="utf-8"):
+        line = line.strip()
+        line = line.replace('\u200b', '')  # 移除零宽空格
+        if line_num == 0:
+            line = line.lstrip("\ufeff")  # 移除可能的BOM
+        line_num += 1
+        if line.startswith("●") or line.startswith("△") or line.startswith("○"):
+            if line.startswith("○ NAME:"):
+                continue
+            data = line[1:].strip()
+            ndata = remove_lf(data)
+            if data != ndata:
+                print(f"{m3t_path}:{line_num}: {data} -> {ndata}")
+                line = line[0] + " " + ndata
+        lines.append(line)
+    return lines
+
+
+def save_lines(m3t_path, lines):
+    with open(m3t_path, "w", encoding="utf-8") as f:
+        for line in lines:
+            f.write(line + "\n")
+
+
+def process_m3t_file(m3t_path, target_path=None):
+    lines = process_m3t(m3t_path)
+    if target_path is None:
+        save_lines(m3t_path, lines)
+    else:
+        os.makedirs(os.path.dirname(target_path), exist_ok=True)
+        save_lines(target_path, lines)
+
+
+def recursive_process_m3t(m3t_path, target_path=None, ext=".txt"):
+    for root, dirs, files in os.walk(m3t_path):
+        for file in files:
+            if not file.lower().endswith(ext):
+                continue
+            full_path = os.path.join(root, file)
+            output_path = None
+            if target_path is not None:
+                output_path = os.path.join(target_path, file)
+            process_m3t_file(full_path, output_path)
+
+
+if __name__ == "__main__":
+    from argparse import ArgumentParser
+    parser = ArgumentParser(description="Post-process M3T files.")
+    parser.add_argument("m3t_path", help="Path to M3T file/directory.")
+    parser.add_argument("target_path", nargs="?", default=None, help="Path to save processed M3T file/directory. If not specified, overwrite original files.")
+    parser.add_argument("--ext", default=".txt", help="File extension to process in directory mode.")
+    args = parser.parse_args()
+    if os.path.isdir(args.m3t_path):
+        recursive_process_m3t(args.m3t_path, args.target_path, args.ext)
+    else:
+        process_m3t_file(args.m3t_path, args.target_path)