Geomembrane (also known as impermeable membrane), with a thickness of 0.2-3.0mm and a thickness of more than 0.8mm, also known as waterproof board. High-quality polyethylene native resin is selected. The main component is 97.5% high-density polyethylene and about 2.5% carbon black, anti-aging agent, antioxidant, ultraviolet absorber, stabilizer and other auxiliary materials are made by three-layer mutual aid technology.