Mechanical bar screen is a kind of advanced solid-liquid separation device in water treatment,which can continuously and automatically remove debris from wastewater for sewage pre-treatment. It is mainly used in municipal sewage treatment plants, residential quarters sewage pre-treatment devices, municipal sewage pumping stations, waterworks and power plants, also it can widely be applied to water treatment projects of various industries, such as textile, printing and dyeing,food, fishery, paper, wine, butchery etc.