Abstract: The methane/air mixture explosion chemical reaction is a complex chain reaction consisting of a series of elementary reaction. Based on the detailed mechanism of methane combustion, the formation rate of the main substances and free radicals in the explosion was studied, and the key element reaction of the explosion of methane/air mixed gas was obtained. At the same time, the reaction heat of the base element in the explosion was analyzed, and the thermal characteristics of the base element reaction were studied, and the main basic reaction of the explosion energy release was analyzed.