The invention belongs to the technical field of anticorrosive paint, and particularly relates to a coating for rusted coating of surfaces of rusted hot-dip galvanized steel structures. The coating comprises a coating A and a coating B; the coating A is prepared from, by weight, 5-8 parts of lauric acid, 12-20 parts of epoxy resin, 42-53 parts of reduced zinc powder, 10-20 parts of xylene, 2-5 parts of ethyl alcohol, 2-4 parts of organic bentonite, 5-10 parts of hectorite and 20-25 parts of water; the coating B is prepared from the following components in parts by weight: 7 to 9 parts of polyepoxysuccinic acid, 3 to 5 parts of a silicate, 2 to 4 parts of a molybdate, 12 to 14 parts of ethylene glycol, 6 to 9 parts of N-sodium lauroyl sarcosine, 8 to 12 parts of acrylic emulsion and 5 to 8 parts of water. The coating has good binding force with the surfaces of the hot-dip galvanized steel, and the adhesive force is 0 grade; the coating is good in flexibility and corrosion resistance, andcan be used for coating the rusted surface of rusted hot-dip galvanized steel with rust.