Rep Power: 0

Hey, so I have a 05 civic si and today it shut off while driving and restarts itself a second later. It happened about 6 times in ten minutes then didn't happen for a few hours then happened a few more times. It has continued to do this all day. Everything shuts off headlights radio gas and rpm both drop as if the car was shut off. It just restarts itself a second later with me doing nothing. Anyone know what's going on or how to fix it?

 
Rep Power: 196

First I would stop driving it as that is an accident waiting to happen. You lose power steering and power brakes, so it's like trying to drive a 1940s tractor.
It sounds like your ignition switch is going bad. But there are many other things that could cause it as well.
Try starting the car and moving the key around a little and see if it shuts off. If it does, your problem is in that area. If it doesn't, it could still be that or one of a dozen other things.