Composite geomembrane (composite anti-seepage membrane) is divided into one cloth and one membrane and two cloth and one membrane, with a width of 4-6m, a weight of 200-1500g/square meter, and physical and mechanical performance indicators such as tensile strength, tear resistance, and bursting. High, the product has the characteristics of high strength, good elongation performance, large deformation modulus, acid and alkali resistance, corrosion resistance, aging resistance, and good impermeability. It can meet the needs of civil engineering projects such as water conservancy, municipal administration, construction, transportation, subways, tunnels, engineering construction, anti-seepage, isolation, reinforcement, and anti-crack reinforcement. It is often used for anti-seepage treatment of dams and drainage ditches, and anti-pollution treatment of garbage dumps.