The invention provides a carbon fiber grounding grid anti-corrosive paint and preparation and application methods thereof. The paint comprises the following components in parts by weight: 30 parts of acrylic resin, 50 parts of dissolving agent, 1.8 parts of epoxy resin, 25 parts of carbon fiber and 5 parts of carbon black serving as conductive filler, 2 parts of diluent, 0.5 part of silane coupling agent, 0.2 part of curing agent and 0.1 part of thickening agent. Strict pretreatment is performed on the surface of a basal body before construction; the surface of the basal body is required to be smooth, dustless and greaseless; the dissolving agent, the conductive filler, the curing agent and the like are required to be fully dissolved during construction; the coating contact is good; the thickness is uniform; the surface is flat; dry environment, ventilation and no pollution are required at a solidification stage; and a coating formed by coating the paint has the advantages of uniformity, compact structure and good conduction performance and has superior corrosion resistance performance.