New preparation method of 1-isothiocyanic acid-4-methanesulfonyl-(2-ene) butane

The invention discloses a new preparation method of 1-isothiocyanic acid-4-methanesulfonyl-(2-ene) butane, and particularly relates to a method for the extraction of sulforaphane from radish seeds or broccoli seeds or rape seeds. According to the method, air-dried radish seeds or broccoli seeds or rape seeds are used as a raw material for preparation of a radish seed crushing liquid, an enzyme deactivated broccoli seed or radish seed dispersion liquid, a degreased fine grinding liquid, a fermentation liquid, a protein removal fermentation liquid, a concentrated liquid, dry polysaccharide powder and high purity sulforaphane freeze-dried powder for preparation of 1-isothiocyanic acid-4-methanesulfonyl-(2-ene) butane with the purity of more than 98%. The production rate of the sulforaphane prepared by the method is high, the operation is simple, and the product has the characteristics of being high in product purity of more than 98%, green, non-pollution and the like. The product prepared by the method can be widely used in medicine and health care industry, and has cancer preventing and resistant function.