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.

slamming your head against the wall is a bit of an anger issues already. Help her to have a breathing exercise every morning sir. Sit with her and talk about your good bondings or experiences in life. If you want to calm her down, before she hits you must already give her a hug or hold her hands then tell her to breathe for a second. 😊