Abstract: Aiming at the poor geological condition and serious spontaneous combustion disaster at 393（II）03 flexible shield support coal face in Tangpu Coal Mine, on the basic of analyzing the characteristics of spontaneous combustion at the working face and current control methods, then applying the technology of fire prevention of three-phase foam, burying pipe in upper corner, pre-constructing borehole, the difficulty of spontaneous combustion is successfully solved, which guarantees safe mining of working face.