Circuit breaker switch

A circuit breaker switch comprises a main body supporting frame, a solid-sealed polar pole and an isolation knife group, the solid-sealed polar pole and the isolation knife group are installed on the main body supporting frame, the solid-sealed polar pole comprises an insulating shell, a vacuum bubble and a wire outlet seat, the vacuum bubble and the wire outlet seat are arranged in the insulating shell, the isolation knife group comprises an isolation knife seat and an isolation knife, and the isolation knife is rotatably arranged on the isolation knife seat; the isolation tool apron is characterized in that first annular grooves are formed in the side walls of the two sides of the isolation tool apron; the two isolation knives are arranged on the two sides of the isolation knife holder respectively, second annular grooves are correspondingly formed in the isolation knives, the isolation knife holder is connected with the isolation knives through first spring contact fingers, the first spring contact fingers