pupae is more than 50%, which is much higher than that of general food, and the essential amino acids in protein are complete. Silkworm chrysalis protein is composed of 18 kinds of amino acids, among which 8 kinds of amino acids which are necessary for human body are high in content, with balanced nutrition and proper proportion, it is a kind of high-quality insect protein. The peptides of silkworm pupa protein after enzymatic hydrolysis have been proved to have many functions such as lowering blood pressure, anti-oxidation, anti-fatigue, anti-tumor, anti-bacterial and so on. In addition, they also contain many trace elements such as copper, iron, zinc and selenium.