Abstract: Soybean is not only a crop of food provisions and economic crops,but also important raw materials for industry.Soybean contains substances which have the special function to the human body by intensive processing,such as phosphatide,oligosaccharides,saponin,isoflavones,natural vitamin.It has great potential for development and is known as the ＂health food＂ of twenty-first century.Bean cake is a major source of dietary protein for animal husbandry and aquaculture.Root nodule bacteria in soybean root are an important support to raw materials.