The paper presents the method of modeling the occurrence of backflashover on HV overhead lines (transmission lines) using the EMTP software package. The paper presents a short theoretical basis and the method of modeling individual components / parts of the overhead line that affect the occurrence of reverse jump (phase conductors, protective rope, pole, insulator chain, pole grounder, lightning current channel, etc.). The model in question, compiled in the EMTP software package, was then applied to the analysis of the phenomenon of reverse jump on the 110 kV HV transmission line, in the shape of a fir head with a steel grid column. The impact of changing individual transmission line parameters (eg the impact of changing the grounding resistance of the pole) on the occurrence of reverse jump was also analyzed.