The invention relates to an antibacterial self-dry paint, which is prepared from the following raw materials by weight part: 8-10 of methyl methacrylate-butyl methacrylate-methacrylic acid resin, 6-8 of reactive alkyl phenolic resin, 30-40 of dry alkyd resin, 2-3 of colloidal silicon dioxide, 2-3 of polyethylene wax, 1-2 of sodium aluminate, 1-2 of dipotassium glycyrrhizinate, 4-8 of silica aerogel, 16-20 of acetone, 1-2 of methyl isothiazolinone, 1-2 of menthol, 2-3 of magnesium oxide, 10-14 of dimethylbenzene, 8-12 of tourmaline powder, and 4-6 of an adhesion assistant. After the coating cures into a film, the film has gloss and toughness, strong adhesion, and has good abrasion resistance, weather resistance and insulation. By adding the dipotassium glycyrrhizinate and menthol, the coating has an antibacterial effect, and by adding the tourmaline powder, the coating can absorb light, force, heat and electricity, and also plays a role of catalytic decomposition, thus being beneficial to environmental purification.