Baicalin is a kind of flavonoid extracted from the root of Astragalus membranaceus. It has remarkable biological activity, has antibacterial, diuretic, anti-inflammatory, anti-metamorphic and antispasmodic effects, and has strong anti-cancer reaction and other physiological effects. . Baicalin also absorbs ultraviolet rays and inhibits the production of melanin, so it is also a good functional cosmetic raw material.