Abstract: Lactoferrin mainly exists in numerous exocrine secretions of mammals,and its content in milk is the highest.Lactoferrin not only has br oad spectrumof antimicrobial properties,but also has the ability to imp rove antiviral activity,anticancer activity,and immunoregulatory activity of the body to prevent and cure infe ctious disease.As a newtype of antimicrobi al protein,Lactoferrion is hopeful to be a functional ingredient of newf unc-tional and curative foods.In this paper it maily summed up essential prop erties,functions and recent researches progresses,and prospects of the dev elopment of Lactoferrin existed in b ovine colostrums.

Key words: lactoferrin(Lf ), properties and functions, researc hes and progresses