从电化学理论出发，建立了当系统略偏离平衡状态时，矿物－溶液界面的面极化等效电路模型．利用非线性网络理论，分析计算了一般电流激发下等效电路的过电位响应．通过对黄铁矿和石墨两类标本的实验对比，证明该等效电路模型是合理的，所作的分析计算是正确的，为进一步研究激发极化的非线性效应提供了合适的理论模型． Based on the electrochemical theory, an equivalent circuit model of the surface polarization of the mineral-solution interface is established when the system is slightly out of balance. Using the nonlinear network theory, the over-potential response of the equivalent circuit under normal current excitation is analyzed and calculated. The experimental comparison of two types of samples, pyrite and graphite, proves that the equivalent circuit model is reasonable and the analysis and calculation are correct, which provides a suitable theoretical model for further study on the nonlinear effect of excitation polarization.