[目的]评价河套农业经济区玉米有害、有益元素生态效益。[方法]采集内蒙古河套农业经济区玉米根系土籽实和茎叶样品,分析了有毒有害及有益元素含量。[结果]主要有害元素在玉米籽实和茎叶中均占很小比例,大部分为低富集元素;大多数有益元素是低富集,只有N属于强富集元素。研究区种植玉米的根系土中As、Pb、Cd、Hg、Cr、Cu含量均低于国家标准,符合绿色标准土壤,产地环境条件优秀。[结论]研究区内的玉米为绿色食品,适宜人畜食用。 [Objective] To evaluate the harmful and beneficial ecological benefits of maize in Hetao Agricultural Economic Zone. [Method] The samples of soil seed and stem and leaf of maize root in Hetao Agricultural Economic Zone of Inner Mongolia were collected. The contents of toxic, harmful and beneficial elements were analyzed. [Result] The main harmful elements accounted for a small proportion of corn seeds and stems and leaves, most of them were low enrichment elements. Most of the beneficial elements were low and only N was a strong enrichment element. The contents of As, Pb, Cd, Hg, Cr and Cu in the root soil of corn planted in the study area were all lower than the national standards, which met the green standard so that the environmental conditions in the producing areas were excellent. [Conclusion] The corn in the research area was green food, suitable for human and animal consumption.