Explosion type circuit breaker with arc chute

The explosion type circuit breaker comprises a shell, a base and on-off metal, the bottom of the shell is open, the base is connected with the open end of the bottom of the shell, the on-off metal is clamped and fixed by the shell and the base, and an explosion assembly is arranged on the base; the shell and the on-off metal jointly form an arc extinguishing cavity, a first groove and a second groove are formed in the upper surface of the on-off metal, the part, between the first groove and the second groove, of the on-off metal is a swing section, the position of the first groove corresponds to the position of the blasting assembly, and a middle base is arranged in the arc extinguishing cavity; the middle seat comprises an arc extinguishing part and an exhaust part, the bottom end of the arc extinguishing part is open, the arc extinguishing part is provided with a plurality of arc extinguishing grids, the plurality of arc extinguishing grids are distributed in parallel at intervals, an interval for the swing