The invention provides an anticorrosion conductive coating for a grounding grid and a preparation method thereof. The anticorrosion conductive coating for the grounding grid is prepared by mixing two components A and B in site according to a mass ratio of 100:2 to 100:8, wherein the component A is prepared by mixing the following substances in percentage by mass and filtering the mixture by a filter screen with a specification of 60 to 100 meshes: 8 to 15 percent of n-butyl acetate, 8 to 15 percent of cellulose acetate butyrate, 8 to 15 percent of natural asphalt, 8 to 15 percent of benzene mixture, 3 to 5 percent of conductive mica powder, 9 to 11 percent of nano graphite powder, 8 to 12 percent of isophorone, 0.3 to 0.7 percent of nano silver powder, 20 to 25 percent of fluorocarbon resin, 3 to 7 percent of propylene glycol methyl ether acetate, 0.1 to 0.3 percent of dispersing agent 923s, 0.05 to 0.15 percent of antifoaming agent 5500 and 0.05 to 0.15 percent of leveling agent 455; the component B is prepared by mixing 20 to 30 percent of a curing agent 3390, 20 to 30 percent of a curing agent TPA-90SB and 40 to 60 percent of n-butyl acetate.