Abstract: For the risk analysis of spontaneous combustion inⅡ020205 fully mechanized caving face of easy ignition coal seam of Yangchangwan Coal Mine, this is divided into four stages of the implementation of fire prevention and extinguishing measures, That is, working face to stop mining line between 162.5 m and 32.5 m, working face to stopping line of 32.5 m to after stopping mining, during the withdrawing period, after sealing of working face. By taking comprehensive prevention and extinguishing measures about the plugging leakage channel above and below the mine, monitoring spontaneous combustion in goaf, burying pipe to inject nitrogen, burying pipe to grouting, pouring into liquid CO₂ by drilling of adjacent tunnel and measures tunnel corresponding support hole, grouting by drilling of measures tunnel corresponding 15 m in the upper and lower corners of the working face, plastic injection by long and short drilling of measures tunnel, water injection in working face pipeline, and so on, the gas concentration in the key fire prevention area of the working area was not overrun, and the goaf without signs of spontaneous combustion, which ensures the safe and smooth withdrawing of the working face.