The invention provides an anticorrosive coating. The anticorrosive coating is composed of a component A and a component B, wherein based on 100% of the total mass of the component A, the component A comprises the following components in percentage by mass: 40-60% of graphene modified magnesium powder, 20-40% of epoxy resin, 0.6-3% of a dispersing agent, 2-10% of a filler, 0.5-5% of an anti-settling agent and 5-20% of an organic solvent; and based on 100% of the total mass of the component B, the component B comprises the following components in percentage by mass: 50-70% of a curing agent, 20-40% of an organic solvent, 1-10% of a coupling agent and 0.5-5% of a curing accelerator. The anticorrosive coating provided by the invention has strong adhesion to a base material, is not easy to falloff from the surface of a base material, and plays a good role in protecting the base material; and the coating has good salt water resistance, water resistance, salt mist resistance and acid and alkali resistance, and achieves a good anti-corrosion effect.