Abstract: A large number of coal gangue emissions has caused a series of ecological and environmental problems such as gangue leachate. It is better to use high technology and economic cost to manage groundwater, which polluted by coal gangue leaching filtrate and mine wastewater. Soil column leaching experiment,simulation experiment of PRB (Permeable Reactive Barrier), and on-site actual repairing experiments were conducted to repair groundwater, which was polluted by Zn, Mn, Pb, Cr, Cu, Cd, Hg and As in coal gangue leaching filtrate. The experiments on soil column leaching showed the adsorption capacities on heavy metals by Lishi loess (particle size is 0.05-0.10mm), sand loam (particle size is 0.05-0.10mm) and silver sand (>0.10-0.25mm) were ordered as:Lishi loess>sand loam>silver sand. Among these materials, the distribution coefficient of Lishi loess to As was with the maximum value of 2.26L/kg. Heavy metal and As in leachate were removed by the wall of Lishi loess, when velocity of groundwater is 0.20m/d and the mass ratio of coal gangue to loess were 5and 7.In the case of 10, part of the As migrated to downstream through the loess wall. The 5-month site remediation experiments showed that using loess as adsorption material in PRB can better removal of heavy metals (Zn, Mn, Pb, Cr, Cu, Cd, Hg) and As in the groundwater. Loess wall with the thickness of 0.5m can remove Cr in the groundwater contaminated by coal gangue leachate. The removal rate of Cr was the highest (70.97%) and the removal rate of Pb was the lowest (43.14%). In actual field repair, for Lishi loess as the adsorption material in PRB technology has a good application prospect.