This machine integrates fine filter, high efficiency demulsification and dehydration into one body. This machine, which can remove large of water without heating, creates the fastest dehydration speed in domestic at present. This machine can quickly separate water from the oil, which even contains half water, to attain cleanness of NAS 6 grade, Convenient using with the go-cart model designed. In a word, it is be used for fast removal of water and impurities in fuel oil or light oil which contains large amount of water.