Abstract: According to the easy spontaneous combustion and gas overlimit problems of the fully mechanized top coal caving mining face in Daxing Mine, the pape r analyzed the variation tendency of the spontaneous combustion three zone depth of the goaf with the ventilation quantity and the ventilation quantity affected to the sp ontaneous combustion and gas concentration.The paper provided the coupling analysis on the increasing ventilation to control gas and the reducing ventilation to contr ol the mine fire.The analysis and calculation results showed that the incoming ventilation quantity could be selected within 1 200 ~ 1 400 m3/ min and the mine fire prev ention and control measures mainly with nitrogen injection and the gas drainage measures were provided.The site practices showed that the fire prevention and control measures and the gas drainage measures based on the ventilation quantity adjustment could be favorable to the gas control and gas uillization and could avoid the spo ntaneous combustion of the goaf.