Abstract: Musk-deer(Moschus sifanicus) is an animal of great economic importance, its ecology was observed at Jianza Xian, Qinghai Province during 1973-1974. The musk gland was dissected and its shape and structicn were illustrated (fig. 1 ). Besides, parts of the musk gland were measured(tab.l) The growth of maxillary canine teeth and musk weight in musk-deer accorded with the following formula(fig. 2 ). Y = 0.33X+1.12 The meat of musk-deer have been eaten veiy good. It occupied 58.55 + 4.87-62.12+3.41% of body weight (tab. 2 ).In order to conserve the musk-deer without killing, its breeding should be developed. We should have a plan for gaming. Numbers of hunted musk-deer must not surpass 60% of the total breeding numbers (or 20% of the numbers of the total population).