In this paper, a proposed moth-ame optimization (MFO) technique has been investigated for obtaining an accurate simulation of the non-uniform electric eld represented by a needle-to-plane gap conguration. The needle electrode is connected to the high-voltage (HV) terminal, while the earthed terminal is connected to the plane electrode. In addition to the non-uniformity of the eld, a transverse dielectric barrier has been presented and investigated along the gap with a different thickness and location. The MFO works to optimize the error given by a numerical equation published before for calculating this eld problem in the presence of a transverse barrier. This numerical equation was based on a correction coefcient called ./, which is dependant on three values, relative permittivity, barrier location, and barrier thickness. The MFO is working to minimize the error given by  using two new optimization factors in the  equation. To ensure the accurate validation of MFO with a minimum error for eld problem simulation, various articial intelligence (AI) optimization techniques have been compared with the MFO obtained results. The comparative study shows that MFO is more effective, especially at 30% of the gap length from the HV electrode which represents the region of highly non-uniform eld along the gap conguration. The numerical results of the eld simulation that are held by different types of AI techniques are compared with those obtained from the accurate simulation results using the nite-element method. The value of the error between the numerical and simulation results shows that MFO is the most effective optimization techniques that can be used in the numerical equation to obtain the best value of the correction factor.With MFO, good agreement has been reached between the proposed numerical equation and the accurate simulation values of the electric eld problem.