The invention relates to self-cleaning hydrophobic paint for a ship. The paint is prepared from components as follows: resin powder, liquid paraffin, a coupling agent, a defoaming agent, a leveling agent, hard barium powder, calcium silicate, nano titanium oxide, nano activated carbon, silicon carbonate and filler and pigment. Graphene powder and titanium oxide with nano micropore structure are added to traditional paint for the ship, so that organic pollutants attached to the surface of a material can be rapidly oxidized into carbon dioxide and water and are automatically volatilized and eliminated, the self-cleaning effect is realized, the problem that the service life of the ship is influenced by seawater corrosion of the ship body and marine attaching organisms is greatly solved, meanwhile, maintenance cost is greatly reduced, the domestic and overseas blank of marine paint technology is filled up, and the market competitiveness is quite strong.