Air pressure switch and gas stove

The utility model discloses an air pressure switch and a gas stove. The air pressure switch comprises a base body, a cavity is formed in the base body, a diaphragm elastic piece is arranged in the cavity, and the diaphragm elastic piece divides the cavity into a first cavity body and a second cavity body located above the first cavity body; an air inlet pipe communicated with the first cavity is arranged at the bottom of the seat body, an adjusting hole communicated with the second cavity is formed in the top of the seat body, and an adjusting screw is in threaded connection with the interior of the adjusting hole; an elastic piece and a conductive movable pole piece are arranged in the second cavity, the bottom of the movable pole piece abuts against the diaphragm elastic piece, one end of the elastic piece abuts against the upper surface of the movable pole piece, and the other end of the elastic piece abuts against the adjusting screw; two conductive pole pieces are also fixed on the seat body and extend i