Abstract: Aiming at the spontaneous combustion condition in the 16203-2 Mine fully mechanized caving face of Jinhe Coal Mine, it judged the ignition points accurately, and analyzed the causes of spontaneous combustion. It discussed the existing problems and influencing factors for the application of traditional fire prevention and extinguishing technology in the working face. Through the application of three-phase foam, it eliminated the fire hazard, ensured the safety production of the coal mine. It put forward the technical experiences of preventing coal spontaneous combustion with three-phase foam in outburst coal mines from the application process and result of three-phase foam.