The invention discloses a marine anticorrosive coating, comprising the following components in parts by weight: 100 parts of water-based epoxy resin emulsion, 5-16 parts of waterborne polyurethane, 1-2.5 parts of modified asphalt, 5-10 parts of a waterborne epoxy curing agent, 10-30 parts of modified nano titanium dioxide, 5-16 parts of modified carbon nanotubes, 5-15 parts of red iron oxide, 3-5 parts of zinc powder, 2-15 parts of fiber fluff, 0.9-2.5 parts of chitosan, 3-8 parts of a coalescing agent, 0.5-1.3 parts of a defoaming agent, 0.3-1.5 parts of a wetting agent, 0.6-1.5 parts of a dispersing agent, 0.5-1.6 parts of a flatting agent, 0.2-0.8 part of a thickener and 5-15 parts of water. The marine anticorrosive coating disclosed by the invention is strong in anti-corrosion property, good in impact resistance, easy to construct, and long in service life when being applied to marine equipment.