The nutritional components of lotus seed shell dry powder are: total ash 3.54%, starch 30.43%, cellulose 27. 10%, tannin 13.05%, protein 4.98%, reducing sugar 6.52% and fat 0.45%. In addition, there are many minerals such as potassium, sodium, calcium, magnesium, iron and zinc. There are all kinds of amino acids in protein of lotus seed shell, and the essential amino acids and amino acids with antioxidant activity account for 35.55% and 12.50% respectively. Lotus seed shell fat contains 6 kinds of unsaturated fatty acids, accounting for 29.07% of the total fatty acids. The extraction rate of flavonoids from lotus seed shell is 8.69%, and the flavonoids extract has good antioxidant activity in oil system. [