Air blocking sealing structure and circuit breaker

The utility model discloses an air-blocking sealing structure and a circuit breaker, the air-blocking sealing structure comprises a circuit breaker housing, the circuit breaker housing is provided with a plurality of installation grooves between a moving contact and an arc extinguish chamber, the installation grooves are internally provided with a pair of oppositely installed air-blocking sealing structures, and each air-blocking sealing structure comprises a housing with an opening and a cover plate. An opening is formed in the shell, an installation space capable of containing an elastic piece is formed between the shell and the cover plate, the elastic piece partially penetrates through the opening, an elastic piece is arranged between the rear end of the elastic piece and the cover plate, and an inclined face is arranged on the upper surface of the front end of the elastic piece. The air-blocking sealing structure can quickly form a closed space, and the sliding elastic sheet does not affect closing. When