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