常规的接地网参数计算方法只能得出接地参数的数值，不能直观反映跨步电压、接触电压和地面电位的分布，为此，提出了接地网参数数值计算方法。根据电流场理论，运用边界元法对接地网进行数学建模，通过Matlab软件计算了垂直二层介质下的接地电阻，同时借助其图像功能直观反映接地网的跨步电压、接触电压以及地面电位的分布。算例表明，该算法精确度高，能够适用于接地网接地参数的研究及工程应用。

The conventional parameters calculation of grounding grid can only obtain the value of grounding parameters, but can not directly reflect step voltage, contact voltage and surface potential distribution. A new calculation method for grounding grid parameters was proposed according to the current field theory, in which the grounding grid was mathematical modeled by boundary element method, the grounding resistance was calculated by Matlab in vertical two layer medium demarcation, and the step voltage, the contact voltage and the surface potential distribution were imaged by Matlab graphical function. The result shows that this calculation method is precision and can be applied in the investigation of grounding grid parameters, which provides a technical reference for engineering application.