Landfill special geomembrane is one of many kinds of geomembrane. Its main raw material is high-density polyethylene medium density polyethylene, which is divided into smooth surface and rough surface. The rough surface is also divided into single and double rough surface geomembrane. At present, the commonly used geomembrane for landfill site is environmental protection (gb-2) geomembrane and the standard of Ministry of urban construction (CJ / T) 234-2006 standard) geomembrane, two kinds of standard geomembrane, due to the different indicators, the added raw materials are also different, and their mechanical indexes are also very different. Generally speaking, the American Standard geomembrane is higher than the environmental protection geomembrane, and the selection of raw materials is relatively strict. At present, most of the domestic landfill engineering design requirements are based on the American Standard geomembrane Compared with the ordinary geomembrane, the special geomembrane for landfill site has higher tensile strength, larger elongation, stronger acid resistance and longer service life. Due to more rainwater this year, the special geomembrane for landfill sites in China is more inclined to use the rough geomembrane with sliding effect. Due to its own characteristics, the special geomembrane for landfill site in China is more suitable for use The environment of our country.