The invention introduces an epoxy ballast tank paint, wherein a component A comprises the following the following substances in percentage by weight: 25-50 percent of epoxy resin, 10-15 percent of glycidyl ether active diluent, 0.3-2 percent of organic bentonite, 0.2-1.5 percent of polyamide wax, 0.3-0.9 percent of adhesion promoter, 0-0.5 percent of acidic group-containing copolymer wetting dispersant, 10-25 percent of superfine mica powder, 5-15 percent of nano-scale anti-rust pigment, 5-15 percent of aluminium trippolyhosphate anti-rust pigment, 3-6 percent of dimethylbenzene and 3-6 percent of n-butyl alcohol; a component B comprises the following substances in percentage by weight: 60-80 percent of phenolic group-containing fatty amine curing agent, 15-30 percent of dimethylbenzene and 5-10 percent of n-butyl alcohol; and the proportion of the component A to the component B is 4.3:1 (in mass ratio). The paint has had a corrosion protection effect for 15 years, and the compatibility of matched paint and a zinc silicate workshop primer meets the requirements of PSPC (Performance Standard of Protective Coatings) standard; VOC (Volatile Organic Compound) content is low; and the paint has low viscosity and has good wettability and permeability for the zinc silicate primer.