Abstract: In this paper,the contents of seven kinds of trace element has been measured in the hair samples from 160 children by the le An River.The results showed that the content of Cu.ZN.Mn.Pb.Fe in the normal control group (Xinjian sample)was lower than that in test group(Zhongzhou Samples).The contents of Cu.Zn in Xinjian samples was lower than that in Daicun samples.The content of Mn.Fe in Xinjian Samples was also lower than that in Caijiawuan samples.A remarkable singnificance could be known in the comparing of the amount of Cu、Mn、Fe between Xinjian samples and Zhongzhou samples,and of Mn between Xinuian samples and Caijiwuan samples (P<0.01).significant differences were found for the contents of Zn、Pb between Xinjian samples and Zhongxhou Samples,and of Zn between Zinuian samples and Caijiawuan Samldes.But for Cd and Ni,but no significant differences in between the samples of any two groups.The children height,body weight and chest circumference of Xinuian,comparing with those of the children in other groups,are higher.The result showed that heavy metal pollution would have effected the Children's health by the Le An River.