The factory test or acceptance test should be done before putting into operation to ensure the MOA's quality,where the impulse current generator is often used to simulate the impulse current and test the stability of withstanding the impulse current.But in the simulation analysis,the lightning current function model was used to study MOA's nonlinear characteristics instead of the impulse current test circuit,and the influence of the difference between the current waveform on the load characteristics was ignored.The lightning current model research status was introduced in this paper,and three models,including double exponential model,Heidler model and Pulse model,were carried out by MATLAB/Simulink.Then simulation results and experimental results were compared and analyzed according to the relative error of residual voltage and energy absorption.Then parameter in Alternative Transient Program-Electromagnetic Transient Program (ATP-EMTP) is determined.The research results can provide reference for the following MOA research on the characteristics of the very fast transient overvoltage (VFTO),the simulation analysis of the circuit model and the lightning protection research.