Sodium Caseinate is made from the Yak milk with high quality in a scientific way. It contains various trace elements for human body. It is used not only as a kind of excellent food additive with high protein and nutrition, but also as a resource of trace element for human body. In addition, it is also a kind of strong emulsifying stabilizerand thickening agent with fine affinity, air function and great value of nutrition .In food industry it is used to improve the quality of products. Sodium Caseinate is announced by FAO and WHO as unrestricted food additive, and so it is widely used in all kinds of food products such as meat processing, roasted food, artificial cream, coffee partner,baby food, cheese, various cake & candies, beverages, medicine, tobacco, cosmetics, and chemical articles for daily uses.1). It has thickening and emulsifying effects, and has high nutritional value because it contains all the essential amino acids required by the human body. Our country stipulates that it can be used for all kinds of food, and it is used in the right amount according to production needs. 2). For dairy products, meat products, protein beverages, etc. 3). Biochemical research.