Abstract: The stage fire prevention and control technology is used for the large mining height spontaneous combustion working face. First, the spontaneous combustion index system is established; Second, the liquid nitrogen injection is implemented in goaf; Thirdly, the pressure balancing ventilation is used. The fire prevention and control technology is analyzed through the fire reason and gas monitoring in working face. The fire prevention and control work includes initial mining, normal mining and retracement ending. The key technology of fire prevention and control is studied and summarized from different levels, different angles.