Abstract: By analyzing the corrosion mechanism and influencing factors of the grounding grid in the soil, and on this basis, combining various evaluation indexes and evaluation methods for soil corrosion at home and abroad, an eight-index comprehensive scoring method was proposed. The results show that there was a good linear relationship between the score and the measured corrosion rate, and the relationship between the score and the corrosion rate was obtained through data fitting (v_corr=0.921Z-0.168 38). The data verify that the model can predict the corrosion rate of the grounding grid within a certain range.