The BT torrent file based on the peer-to-peer (P2P) file sharing protocol is an important way to acquire and share network resources nowadays. But sometimes the files list within a torrent file downloaded from Internet can be very disordered, whereas what we need is probably just a part of the listed files. In particular, more and more torrent files were deliberately added a large amount of objectionable AD images, promotional texts, Internet Shortcuts linking to web pages, and other junk files by their makers or spreaders.