Abstract: The impulse current dispersion characteristics of grounding devices under continuous lightning impulse can better reflect the lightning protection effect of the tower grounding,and tower grounding devices in different soil areas have different impulse current dispersion characteristics under continuous lightning impulse. To explore this characteristic,a double pulse 5-segment horizontal grounding body simulation model considering spark effects is established based on ATP-EMP software in this paper,and simulation and experiment are combined to study the continuous impulse characteristics of grounding devices in different soil areas,and the two impulse grounding resistance values are analyzed and calculated under continuous impulse. The results of the study show that the impact characteristic of the grounding device under continuous impact is far different from that under the single impact. This is mainly due to the different soil environments in which the grounding devices are located,and the effects of spark effect and volatilization effect on the soil impact dispersion effect will interact,resulting in large differences: when the soil is relatively wet,the secondary impact dispersion effect is worse than the primary impact dispersion effect,and when the soil is relatively dry,the secondary impact dispersion effect is better than the primary impact dispersion effect.