Baicalin is a flavonoid extracted from the root of Scutellaria baicalensis Georgi, which has obvious biological activity, antibacterial, diuretic, anti-inflammatory, antiallergic, spasmolytic and other physiological functions. It plays an important role in clinical medicine. Baicalin can also absorb ultraviolet rays, scavenge oxygen free radicals and inhibit the production of melanin, so it can be used in both medicine and cosmetics, and is a good raw material for functional cosmetics.