Soybean milk is rich in high-quality protein and various trace elements needed by human body, and is known as "green milk". Its nutritional value is similar to that of milk. The content of protein is as high as 2.56%, which is higher than the standard of milk (2%). The protein in soybean milk is high-quality plant protein. Soymilk is also rich in minerals such as calcium, phosphorus and iron, and the iron content is 25 times that of milk; Soymilk does not contain cholesterol and lactose, while milk contains lactose, which can be decomposed and absorbed by human body under the action of lactase, but most people in China lack lactase, which is also the main reason why many people have diarrhea when drinking milk. In addition, soybean milk is also rich in unsaturated fatty acids, soybean saponins, isoflavones, lecithin and other dozens of substances beneficial to the human body. It has the functions of lowering human cholesterol, preventing hypertension, coronary heart disease, diabetes and other diseases, enhancing immunity and delaying aging.