The invention discloses a metal paint, which is prepared from the following raw materials in parts by weight: 180 to 190 parts of dodecenylsuccinic acid, 130 to 135 parts of propylene glycol, 210 to 215 parts of glycidyl methacrylate, 360 to 365 parts of 2-ethyl hexyl acrylate, 430 to 435 parts of methylpropanediol, 105 to 108 parts of phenolic resin, 85 to 90 parts of styrene, 100 to 110 parts of ethylenediamine, 300 to 310 parts of titanium dioxide, 20 to 30 parts of modified diatomite, 7 to 8 parts of formic acid, 100 to 105 parts of water, and 14 to 16 parts of sodium hydroxyethyl sulfonate. The raw materials are mixed, dispersed at a high speed, and grinded into nano-grade metal paint. The coating formed by the metal paint has the advantages of high hardness, scratch prevention, strong attachment, salt mist resistance, saline water resistance, acid and alkali resistance, water and oil resistance, recycling on oil paint film surface, paint film hurt prevention, super-strong paint film flexibility and the like. The service life of a conventional paint film can be between 5 and 8 years.