Abstract: The periphery of the bandingliangta coal mine has a large outdoor area of self-ignition coal,and it connect the gob.Under the influence of the negative pressure ventilation of the mine,the fire zone spreaded,and produce mass CO gas.It restrict the mine’s safety production.By analyzeing the trait of the tunnel wind leaking of the high negative pressure area,we choose thetiangu filling material to blocking the wind leaking area of the tunnel,and use different treatment scheme to blocking the shallow and the deep wind leaking tunnel.It makes the bandinglingta coal mine produced safely.