Demulsifier BX-01 is a mixture of polyether, alcohol solvent and water and belongs a low-medium flash point demulsifier. It provides excellent demulsification effect for crude oil of medium-high water-cut oilfields and has characteristics of rapid dehydration, clean dehydrated water, high final dehydration rate and tidy oil-water interface. This product is mainly used for dehydration and desalination of crude oil of oilfields andrefineries.