Bentonite waterproof blanket is made of sodium bentonite, composite geotextiles and non-woven. High expansion of sodium bentonite is filled in a special composite geotextiles and non-woven fabrics. Sodium bentonite forms a high-density diaphragm in a hydraulic state, has good impermeability performance. In addition, the volume of sodium bentonite expand with water, can play the role of protection and reinforcement. So it is widely used in landfill, embankment, pond, underground garage and artificial lake to prevent infiltration and solid foundation. And bentonite waterproof blanket is easy to install and repair. It can shorten the construction period and save costs.