Method of extracting and separating ginseng saponine mixture from American ginseng leaf

A process for extracting and separating the mixture of ginsenoside from American ginseng leaf includes such steps as preparing the general ginsenoside from American ginseng leaf, chromatography by alumina column, eluting with water or low-concentration organic solvent, recovering solvent to obtain A group of ginsenosides, eluting with the aqueous solution of tetrahydrofuran, and recovering solvent to obtain B group of ginsenosides.