The application of three cloth and two membrane is less. The design of three cloth and two membrane is 200g / 0.3mm/200g/0.5mm/200g or 200g / 0.3mm/200g/1.0mm/200g. Because of its excellent anti-seepage performance, it is often used in river regulation and water conservancy projects. Compared with two cloth and one membrane, three cloth two membrane has more one protection performance and excellent anti-seepage performance