Abstract: To solve the sign problem of coal spontaneous combustion in the mining operation of 1308 working face in Guojiahe Coal Mine, the characteristic parameters of coal spontaneous combustion are analyzed by the on-site coal sampling experiment, CO and C2H4 are determined as the index gas of coal gas spontaneous combustion. The causes of coal spontaneous combustion and the prominent process of spontaneous combustion in goaf under the influence of high pumping alley without collapsing in time are analyzed. The site adopts the collaborative prevention and control method of plugging, cooling and high pumping alley releasing pressure to control oxygen. Through the detection of index gas in the high pumping alley, the result shows that the concentration of CO in 1308 working face is effectively controlled to ensure the safe mining for the working face.