Abstract: Objective To investigate the contents of trace elements and the supplementation situation of trace elements of children in Dujiangyan city, and to guide the parents to add reasonable trace elements to their children. Methods The trace element test results of 3 769 cases of 1 month-old-12 year-old outpatient children were analyzed statistically and reviewed retrospectively,and 200 cases were selected randomly and conducted questionnaire survey. Results The deficiency rates of zinc(30.0%, 1 113 cases), iron(14.7%, 553 cases) and calcium (9.5%, 358 cases) were high. The excessive rates of calcium(25.4%, 964 cases) and zinc(3.9%, 149 cases)were high. The 46% of the 200 cases had been supplemented trace elements by parents[calcium supplementation(85%),zinc supplementation (41%) and iron supplementation (18%)]. Trace element supplementation guided by the media accounted for 51.0%,guided by their own experience accounted for 34.8%, and guided by medical advice accounted for only 18.5%. Conclusions The trace element supplementation of children in Dujiangyan city is not optimistic, and the lack of zinc,iron and calcium is popular. The children do not be supplemented trace elements reasonablely. Children should have regular testing for trace elements, and the diet structure should be adjusted rationally, in order to intensify the children healthcare.

Key words: Zinc, Iron, Calcium, Trace element, Child, Rationality, Supplementation