how i can stop the torrent ??

i have a server and alot of my users used torrent i want forcing them to stop

This has been covered numerous times all over this forum. Do a quick search and be prepared to do some reading… because it isn’t a quick and easy process. Torrents are really smart about getting around firewalls!

can you give me a better method ?/

A better method than for you to search the forum and do a little bit of reading and then some copy and paste of some rules?!?

There is a better method:

You can pay any of these professional consultants. They are ceertified and they will happily do it for a certain fee!
http://www.mikrotik.com/consultants.html