"Tianhai" composite geomembrane is a geosynthetic material made of geotextile (nonwoven fabric, woven fabric) and polymer material (HDPE/LLDPE/EVA film, etc.), which is calendered and hot melted. It has the properties of tensile strength, tear resistance, high bursting strength, root penetration resistance, anti-aging, etc. It has fast stress dispersion, small displacement, fast construction and low cost.