Calibrating device for high-altitude combustible gas alarm

The utility model provides a calibrating device for a high-altitude combustible gas alarm. The calibrating device comprises a gas mass flow controller, a portable ventilation rod, an infrared combustible gas concentration detector and a concentration detector receiving end, a gas outlet of the gas mass flow controller is connected with a gas inlet end at the bottom of the portable ventilation rod through a pipeline, and the top of the portable ventilation rod is connected with a gas inlet of the infrared combustible gas concentration detector; a gas outlet of the infrared combustible gas concentration detector is connected with a sensor of a detected high-altitude combustible gas alarm through a gas calibration cover, and the concentration detector receiving end receives a gas concentration signal sent by the infrared combustible gas concentration detector. The utility model aims to solve the problems that the response time cannot be accurately measured, the gas flow is difficult to stably control and the lik