Abstract: The contents of nine elements Ca, Cr, Mn, Fe, Ni, Cu, Zn, Pb, Se in the hair of 305 children under seven years of age and 248 men above eighteen years of age have been analysed by XRF method. The results are compared among the city of Tianjin, Shanghai and other foreign regions.The relations between the amount of trace elements in human hair and growth of body, infirmities of age, properties of soil and food compositions are discussed.