This standard specifies the specifications, dimensions, technical requirements and test methods of polymer reinforced composite waterproof sheet. The sheet is made of polyethylene (PE) Resin or ethylene-vinyl acetate copolymer as the core layer material, adding antioxidants, dispersants and other additives, by extrusion, calendering, hot compress composite woven fabric or non-woven fabric. It is suitable for various waterproof and moisture-proof occasions such as roofs, indoors, walls, hydraulic and hydraulic facilities of buildings and structures. It is an important material to ensure the durability and safety of building structures.