As a new type of material, the anti-seepage film has excellent anti-seepage, anti-corrosion performance, good chemical stability, and can be processed and characterized according to actual engineering needs. It has been widely used in dykes, dams and reservoirs of water conservancy projects. Anti-seepage, and also used as anti-seepage, anti-corrosion, anti-leakage and moisture-proof materials in channels, reservoirs, sewage pools, swimming pools, building construction, underground buildings, garbage dumps, environmental engineering, etc. Developed countries have been widely used since the 1930s. Since the 1980s, China has gradually promoted the use of HDPE anti-seepage membranes in various projects.