The invention discloses a simulation analysis method for the change rule of a vertical grounding body structure and a surrounding electric field thereof, and the method comprises the steps: obtainingvoltages before and after a vertical grounding body welding tip discharge electrode, and determining the surrounding voltage change rate after the vertical grounding body welding tip discharge electrode; Establishing a vertical grounding body simulation model; Performing simulation analysis on the rule of influence of the tip discharge electrode on the voltage around the vertical grounding body toobtain electric field change rules around different grounding body structures; And determining the optimal structure and specific geometric parameters of the vertical grounding body. The change ruleof the geometric shape of the vertical grounding body and the surrounding electric field is obtained, and the optimal vertical grounding body design structure is obtained.