Corn protein feed is a by-product of corn starch processing. Corn protein powder contains amino acid and pigment - lutein, which is a feed material; Corn gluten meal is mainly composed of corn gluten, which is rich in protein and nutrition. There is a small amount of starch and fiber in corn gluten meal, which has special taste and color. It can be used in feed. Compared with fish meal and soybean meal, which are often used in feed, its feeding value is more obvious. Therefore, it can be used to replace some protein feeds such as soybean meal and fish meal in the feed market where there is a shortage of soybean meal and fish meal; The advantages of corn protein powder added to feed are that the product has few anti-nutritional factors, rich nutrition and stable feed additive performance