Black bean sprout is a kind of fresh and nutritious bean sprout. It is rich in protein, unsaturated fatty acids, phosphorus esters, calcium, phosphorus, iron, potassium, sodium, carotene, vitamin B 1, vitamin B2, vitamin B 12, nicotinic acid, folic acid, raffinose, stachyose, choline, daidzein, saponin and other nutrients, and has the functions of relieving swelling, reducing qi.