The high pollution resistance reverse osmosis membrane element is a polyamide composite membrane used for brackish water desalination, which has the characteristics of low pressure operation, high water yield and good salt removal performance. Because of the special process used to treat the membrane surface, Increase the hydrophilicity of the membrane surface, thereby reducing the deposition of pollutants and salts on the membrane surface, to achieve the effect of anti-pollution, can be used for the treatment of surface water, groundwater and municipal tap water with a salt content below 5000ppm, of which 8-inch membrane is especially suitable for large and medium-sized industrial water reuse, containing a small amount of organic pollutants or high salt industrial wastewater, urban sewage and other water sources Reason. The 4-inch membrane is especially suitable for small-scale industrial water reuse, industrial wastewater containing a small amount of organic pollutants or high salt,