My wife is very hot tempered and she like to hit me when she lose her temper. She will dig her fingernail into my skin and sometimes she will slam my head against the wall. I don't want to hit her back. I love her. I believe she loves me too. How can I calm her down. And stop her from abusing me like this.

woke what the others said, try talking to her about it first, the next course of action is to seek help through a counsellor. You've been a real gentleman by not reacting physically, that can only make matters worse. Can you remember when she started this behaviour? Try and retrace what the trigger was and see whether a counsellor can pick up from that and help both of you out.