Complex enzyme for milk cows is one of complex enzyme, which is designed according to milk cows physiological characteristics and feed raw materials. This Complex enzyme is mainly the amylase, celluse, BETA-dextranase, Xylanase, protease with other endogenous enzymes which can well suit for character of the poultry digestive tract. The product through many optimization experiment, which can well digest non-starch polysaccharide, improve the use rate of feed .