There are many varieties of artichokes, clean them is simple enough really very little. In the photos you will see as you progress. Of course it also depends on the type of preparation or recipe you need to do.
Divide the artichoke by the stem.
Remove the outer leaves so as to leave only the heart almost.
Also delete the beard inside if there was, if you need to cut them and put them in water with lemon juice to prevent discoloration.