采用镜像法 ,对经皮刺激电极下人体组织中电位场和电流密度场的分布进行了理论的推导 ,得到了场分布的解析解 ,以此解析解为基础 ,推导出电极下场分布的数值解 .在此基础上 ,通过模拟实验进行了验证 .结果表明 ,刺激电极下的电场与电流场分布是不均匀的 ,当刺激电极安放在被刺激神经正上方并沿神经走行方向放置 ,效果最好 Using the mirror method, the distribution of the potential field and the current density field in the human body tissue under the percutaneous stimulation electrode was deduced theoretically, and the analytic solution of the field distribution was obtained. Based on this analytical solution, the numerical solution of the field distribution of the electrode On the basis of this, it is verified by simulation experiments that the distribution of electric field and current field under the stimulation electrode is not uniform, and the stimulation electrode is placed right above the nerve to be stimulated and placed along the nerve walking direction, which is the best