The invention discloses a method and a device for early warning the explosion of gas and other combustible gases. A plurality of monitoring points are arranged in a mine area; and the explosion early warning device of the gas and other combustible gases is arranged. A sampling air current main pipeline of the device is internally provided with an isolation chamber and a combustion chamber; an air distribution system is used for injecting the gas into the combustion chamber at the fixed time and fixed quantity; an electronic ignition system can be used for simultaneously and continuously igniting at fixed time through an electronic ignition head until the combustion and the explosion occur; an electrical control system is used for acquiring the explosion time and injecting gas quantity data and enters a control circuit board for data processing to obtain safety degree estimation; and the output is respectively connected with an alarm circuit, a safety control center and a safety system network and is used for starting an emergency response plan and corresponding safety system control equipment. By adopting a brand new method and a device, the condition that the combustible gas is ultralimit can be quickly found by continuously testing the dynamic data of the mixed combustible gas, early warned in advance, and quickly handled, thereby avoiding the heavy losses of life and property of people.