Abstract: Electrostatic lens potential distribution measurement experiment is an integral part in the course of Electronic and Ion Optics. According to the principle of the similarity between the current field in weak electrolyte and the passive electrostatic field in the vacuum, in the electrostatic lens potential distribution measurement experiment, the electrostatic field is simulated by the AC current field generated by the lens electrode in the electrolytic cell, and the electrostatic lens potential distribution measurement can be realized. The article analyzes the feasibility of simulating the electrostatic field in the AC current field, the advantages of the AC field in simulating the electrostatic field, and the influence of the frequency of the current field on experimental results. This article introduces the experimental principle and steps to measure the potential distribution of electrostatic lens by using split-type electrolytic cell to simulate axisymmetric electric field, and methods of handling experimental data with the help of data list, drawing and function calculation of Excel. The experimental device has the advantages of simple operation and intuitive electric field distribution. Experiments can boost the effectiveness of experimental teaching and enhance students’ hands-on ability.