The Belt-oil stripper is the most reliable and economical machine to separate oil from surface of fluid which is low-power consumption and without any materials, It can separate any oil slick such as engine oil, kerosene, lubricant, seed fat which is light than water from mixture of water and oil no matter how thick the oil slick is. The oil which separate by the machine can reuse. This machine is very fit for sewage disposal system of oil field , refinery, steel works, electroplate factory, packinghouse, catering industry, sewage treatment works, garage, parking lot, washing-line of metal parts, covered reservoir, scrap wildcat, and so on.