Geosynthetics clay liner (GCL) is a new type of environmental composite material waterproof and anti-seepage, and it is also a kind of waterproof material based on the swelling principle of bentonite in water. Bentonite particles is filled between the woven geotextile and the non-woven geotextile. The upper non-woven fiber is combined on the lower woven fabric with special process and needling method.