Abstract: The coal seams of first mining face 10414 were spontaneous combustion coal seams in Yangliu Coal Mine, due to the unstable roof and fault zone, the largest thickness of residual coal in the goaf was about 2.0m. Because the working face advanced slowly, combined with serious air leakage, high temperature appeared outside the machine lane in the goaf, open fire had not yet come out. In order to prevent the occurrence of spontaneous combustion fires, the working face was closed, it developed systematic plan of fire prevention and extinguishing, it used governance ideas of controlling air leakage, lowering oxygen, eliminating high temperature, preventing recrudescence, which met the unsealed requirements after implementation, it was unsealed safely.