Please help!! I want to know do I need to replace my main power breaker which is outside on my pole... It keeps tripping, which causes all of the power in my house to shut off. All of the sub circuits are still on in my breaker inside my home, so Im just trying to see what's causing the power main to keep tripping

There could be several reasons it is tripping. Please call an electrician now! This is not something you should mess around with yourself.

Without knowing the loads on your main, there is no way to tell if the breaker is bad, or if you have exceeded the capacity of the breaker. What amperage is it? How big is your home? Has this been happening a while or did you add a major appliance or have some electrical work done?