Filament composite geomembrane is an impermeable material composed of geotextile and geomembrane. It is mainly used for seepage control. The composite geomembrane is generally 4-6m wide and weighs 200-1500g / m2. It can meet the requirements of water conservancy, municipal administration, construction, transportation, subway, etc Tunnel and other civil engineering needs. Due to the selection of polymer materials and the addition of anti-aging agent in the production process, it can be used in unconventional temperature environment with good flexibility. In addition to aging resistance, high strength, good flexibility and isolation performance of geotextile, it also has sealing (anti-seepage) function.