Abstract: In this paper, the position coordinates of lightning strike points are determined preliminarily according to the principle of multi-station lightning location. With the confirmed position coordinates of lightning strike point as the source point and the detection station as the end point, the finite difference time domain method was adopted to conduct magnetic field simulation based on the real terrain and flat terrain. According to the difference of magnetic field waveform of different stations, cluster analysis was carried out on the measuring stations, and some measuring stations were selected by the clustering analysis results for positioning again. By means of cluster analysis, the stations with large errors caused by the difference of terrain and geomorphology are screened out, so as to improve the accuracy of lightning location and provide a more accurate reference and basis for the later accident analysis.