Composite geomembrane is made by heat bonding long-fiber or short-fiber geotextile with PE geomembrane, featuring excellent flat drainage and waterproof properties. It is available in one-geotextile-one-membrane and two-geotextile-one-membrane configurations. It boasts high physical and mechanical properties such as tensile, tear resistance, and puncture resistance. The product has high strength, good elongation, large deformation modulus, resistance to acid and alkali corrosion, aging resistance, and excellent waterproofing performance. It can meet the civil engineering needs of waterproofing, isolation, reinforcement, crack prevention, and reinforcement. Due to its use of high polymer materials and the addition of anti-aging agents, it can be used in unconventional temperature environments.