目的了解高压输变线的工频电磁场对人体健康的影响,研究人群血清中微量元素变化。方法选择某地500kV超高压输变线廊途经的3个村为调查点,以高压输变电网垂直线水平距离≤20m区域内人群259人为实验组,水平距离>100m人群148人为对照组,检测并比较两组人群体内的钙、镁、铜、铁、锌含量的差异。结果两组人群室内电场和磁场强度均未超过国家相关环境评价标准,两组人群的微量元素含量差异无统计学意义。结论工频电磁场对人体中的微量元素影响,与暴露强度、时间、距离及个体差异等因素有关,有待进一步研究。 Objective To understand the influence of power frequency electromagnetic field of high voltage transmission line on human health and to study the changes of trace elements in human serum. Methods Three villages with 500kV EHV power transmission and transformation corridor passing through a certain place were selected as survey sites. Taking the vertical distance between vertical lines of 25kV transmission line as the experimental group and 259 people whose horizontal distance was less than or equal to 20m as the experimental group and 148 persons whose horizontal distance was more than 100m as the control group, The levels of calcium, magnesium, copper, iron and zinc in the two groups were detected and compared. Results The indoor electric field and magnetic field strength of the two groups did not exceed the national environmental assessment standards. There was no significant difference in the content of trace elements between the two groups. Conclusion The effects of industrial frequency electromagnetic fields on trace elements in human body are related to exposure intensity, time, distance and individual differences, which needs further study.