The utility model discloses an automatic fire -extinguishing switch cabinet, including the cabinet body, the internal electricity distribution room that are equipped with of cabinet, electricity distribution room upper ends be equipped with the room of putting out a fire, the indoor fire extinguisher that is equipped with of putting out a fire, the fire extinguisher through the take -up (stock) pan be fixed in put out a fire indoor, fire extinguisher control switch control by electric machine drive mechanism, the electricity distribution room both sides be equipped with a plurality of fans, every fan outside be to should there being individual air outlet, the electricity distribution room top surface be equipped with temperature sensor, temperature sensor and electric machine drive mechanism the control unit are connected, control electric machine drive mechanism open. The utility model discloses can effectual solution when the conflagration appears in the cubical switchboard, the very first time is put out a fire, reduces the loss, the cabinet body still is equipped with better ventilation system simultaneously, can guarantee the requirement of the internal aridity of cabinet, avoids the electric short circuit that causes because of humidity is too big.