Abstract: In order to study the original ignition source of gas burning at 6₁35 working face to guide the prevention and treatment of gas burning incidents, laboratory basic parameters of spontaneous combustion and field temperature, gas monitoring experiment were designed, and spontaneous combustion characteristics of 6₀ and 6₁ coal seams and the temperature, the gases situations in gob were obtained. The result showed that the probability of polyurethane self-heating and 6₀ coal mine spontaneous combustion with gas extracting was very small, and coal pillar spontaneous of the geological formation at 6₁35 belt conveyor lane was the original ignition source.