Abstract: Mixed colostrum milk was defatted by centrifugation,and then was added with different doses of Na2HPO4,CMC and lactose to improve its thermalstability. Based on single factor,the optimal processing conditions of colostrum milk by L9(33) orthogonal test are determined as follows:Na2HPO4 0.0027 g/ml,CMC 0.0023 g/ml and lactose 0.0027 g/ml,as well as sterilization temperature 60 ℃ and sterilization time 20 min. A certain amount of immunoglobulin remaining in the processed colostrum milk can improve human immunity to a certain extent. So the colostrum milk is a better functional milk drink.

Key words: colostrums, stabilizer, immunoglobulin, milk