Abstract: The 12^# coal in southern wing compound area of Daliuta Coal Mine Huojitu Well is spontaneous combustion coal seam, the shortest spontaneous ignition period is 45 days, and the end of the stratified stoping in the zone is early. In the absence of artificial roof, the mining process of top coal mining is adopted, for that reason, in the lower layer, the working face is long parked and the upper part has a large area of goaf, so, the form of fire fighting is particularly severe. In view of this, the risk factors of spontaneous combustion of coal seams in the composite area are analyzed, and comprehensive fire prevention measures based on daily fire prediction and prediction are adopted, including reducing wind and pressure, blocking air leakage, pouring yellow mud and injecting nitrogen. The gas control in goaf is within the normal level range, and the safe stoping of two working faces in compound area is realized.