In order to study the influence of layered soil on the impulse current dispersing characteristics of grounding device. This paper proposes a simulation method for the impulse characteristics of the double-layer soil tower grounding device based on ATP-Draw. By using the Laplace method, the grounding resistance of the horizontal grounding body and the vertical grounding body in the double-layer soil are calculated. The conductivity parameters, capacitance parameters, and inductance parameters of each part of the chain circuit model of the grounding device under the double-layer soil structure are obtained. ATP-Draw simulation model of pole grounding device in complex soil is established. The proposed model can realize the simulation analysis of lightning impulse characteristics of transmission line pole grounding device in the sealed layer soil and the accurate calculation of impact grounding resistance. The contribution of this paper can be applied in the grounding system design of power transmission tower.