diff --git a/decrypt_db.py b/decrypt_db.py
index e952141..7daab5c 100644
--- a/decrypt_db.py
+++ b/decrypt_db.py
@@ -176,6 +176,16 @@ def main():
         else:
             failed += 1
 
+        # 清理 sqlite3.connect() 验证遗留的 -shm/-wal 空文件
+        # 避免后续工具打开 .db 时优先读旧 WAL 报 "database disk image is malformed"
+        for suffix in ("-shm", "-wal"):
+            residual = out_path + suffix
+            if os.path.exists(residual):
+                try:
+                    os.remove(residual)
+                except OSError:
+                    pass
+
     print(f"\n{'='*60}")
     print(f"结果: {success} 成功, {failed} 失败, {skipped} 跳过(无密钥), 共 {len(db_files)} 个")
     print(f"解密数据量: {total_bytes/1024/1024/1024:.1f}GB")