Abstract: Spectrum absor ption method was used to determine the contents of microelements (suchas Zn, Cu,Ca,Mg and Fe) in the blood and in the hair of the Han, Uigur, Kazak people innormal health state. The results showed that ·he above mentiond elements in the hair arrangedsuccessively downwards as Ca> Zn> Mg>Fe>Cu and those in the blood of Han people arran-ged as Fe> Ca> Mg> Zn>Cu, of Uigur an·l Kazak people as Fe> Mg> Ca> Zn> Cu.
Besides, thecontentof the microelement Mg in the blool and in 1he hair of the Uigurand Kazak people is obviously higher than that of the Han people's (p <0.05).

Key words: Microelement; Han; Uigur; Kazak nationality