Static contact system mounting structure and universal circuit breaker thereof

The invention discloses a static contact system mounting structure and a universal circuit breaker thereof, the static contact system mounting structure comprises a static busbar, an insulating gasket, an arc striking sheet and a static contact arranged on the static busbar, the static busbar, the insulating gasket and the arc striking sheet are sequentially connected and mounted on a bottom plate, the static busbar is mounted on the bottom plate through a first positioning structure, and then the insulating gasket is mounted on the static busbar through the first positioning structure; then, the arc striking sheet is mounted on the insulating gasket through the third positioning structure, so that a pre-positioning mounting effect on the static busbar, the insulating gasket and the arc striking sheet is achieved, and finally, the static busbar, the insulating gasket, the arc striking sheet and the bottom plate are fixedly connected through the fastening structure. According to the technical scheme, the stati