Abstract: Before fully mechanized caving face of spontaneous combustion coal seam stop mining,the top-coal is not be recycled,and after the retracement of working face support,the top-coal will fall.When the working face is not tightly closed or coal pillar along the gob fractured and coal crushed,the air leakage channel is formed,which provides the conditions for spontaneous combustion of the lost coal in gob.These can easily result in spontaneous combustion in closed gob coal mining terminal line.How to quickly determine the firing position and to rapid eradicate fire by using effective means,to reduce the hazards of spontaneous combustion on mine and to decrease material waste on the prevention process are the main problems in mine.This article summarizes a set of effective prevention fire technology about fully mechanized caving face mining terminal line by the research of spontaneous combustion on 163_low04 working face mining terminal line.