Plasma protein is the main solid content of plasma, about 60 ~ 80g/L. Plasma protein has different varieties and different functions. Domestic animal protein industry is in a rapid development stage. Animal protein as feed additives are widely used in feed production, but its application in the food is still at a relative low level. Pig blood contains rich protein and is  known as the "liquid meat", and pig blood processing project has a broad prospect. Blood plasma and blood protein powder products are perennially applied in feed industry. In recent years, the elongation to food also has optimistic market prospect.