The invention provides waterproof art painting, which is prepared from the following raw materials in parts by weight: 30 to 60 parts of epoxy resin, 20 to 30 parts of mica powder, 5 to 10 parts of nanosilicon dioxide, 5 to 10 parts of neopentyl polyol ester, 3 to 6 parts of glycerinum, 4 to 8 parts of silicone oil, 2 to 8 parts of dibutyl phthalate, 2 to 6 parts of polyethylene glycol, 0.5 to 1.5 parts of tricresyl phosphite(2,4-ditert-butylphenyl) ester, 1 to 3 parts of dibutylhydroxytoluene, 10 to 15 parts of pigment powder, 2 to 4 parts of dispersing agent, 1 to 3 parts of anti-sedimentation agent, 10 to 20 parts of ethyl alcohol, and 20 to 40 parts of water. A preparation method comprises the steps of preparing resin liquid, mixing the raw materials, standing, sieving, and filling to obtain a finished product. The art painting provided by the invention is reasonable in formula, fine and smooth in quality, durable in color and lustre, low in price, good in waterproofness, stability and inoxidizability, long in service life, simple in preparation method, and easy for industrial production.