The lotus leaf extract is nelumbonuciferagaertn The dry leaf extract mainly contains alkaloids, flavonoids, volatile oils and other components. Flavonoids, the scavengers of most oxygen free radicals, have a significant effect on the treatment of coronary heart disease, hypertension and other diseases, and have antibacterial and anti-inflammatory effects; It can not only be used as an API for cardiovascular diseases, but also widely used in functional foods, health food, beverages, food preservatives and cosmetics.