Circuit breaker contact system

The invention discloses a circuit breaker contact system which comprises an arc extinguishing cylinder, moving contacts and a static contact. The moving contacts and the static contact are both located in an inner cavity of the arc extinguishing cylinder, the bottom of the inner wall of the arc extinguishing cylinder is in threaded connection with a bottom plate, and a motor is fixedly mounted atthe bottom of the bottom plate. The power output end of the motor is fixedly connected with a rotating shaft, the rotating shaft penetrates through the bottom plate and extends to the inner cavity ofthe arc extinguishing cylinder, and the top of the rotating shaft is vertically and movably connected with a pressing rod. Moving contacts are symmetrically installed on the side wall of the pressingrod, and the top of the pressing rod penetrates through the arc extinguishing cylinder, extends to the outer side at the top of the arc extinguishing cylinder and is fixedly connected with a knob. A fixing plate is fixedly inst