Explosion-proof circuit breaker

The utility model relates to an explosion-proof circuit breaker. A port connecting plate is arranged on the outer side of a top opening of the shell, and an upper cover connecting plate is arranged on the outer side of a bottom opening of the upper cover; a side base is arranged on the side portion of a shell body of the outer shell, two threading sleeves are arranged on the side base, a side cover is installed on the side base and comprises a cover plate, two base sleeves are arranged on the cover plate, and sealing assemblies are arranged in the base sleeves. A leakage protector is installed in the shell, a top base is installed in the middle of the upper cover, and an operation device is installed in the top base. The operation device comprises a rotating shaft, a handle is installed at the upper end of the rotating shaft, a rotary shifting block is installed at the lower end of the rotating shaft, a shifting fork is installed below the outer end of the rotary shifting block, the operation device further c