The invention discloses an anti-corrosion solution for a cedar board. The anti-corrosion solution is prepared from the following components in parts by weight: 5 parts to 6 parts of sodium metabisulfite, 3 parts to 4 parts of polyethylene glycol, 15 parts to 18 parts of propylene carbonate, 10 parts to 15 parts of parachlorometaxylenol, 2 parts to 3 parts of nano silicon dioxide, 1 part to 2 partsof nano titanium dioxide, 0.6 part to 1.2 parts of monodisperse colloid microsphere, 1.1 parts to 1.8 parts of carbon nano-tube, 5 parts to 8 parts of alkyl dimethyl benzyl ammonium chloride, 1 partto 3 parts of zinc sulfate, 1 part to 3 parts of copper citrate, 0.6 part to 1.1 parts of potassium bromide, 3 parts to 4 parts of bronopol, 25 parts to 30 parts of methylene bisthiocyanate, 30 partsto 40 parts of fatty alcohol polyvinyl chloride ester and 50 parts to 60 parts of water. The anti-corrosion solution for the cedar board disclosed by the invention has the characteristic that an anti-corrosion effect of the cedar board can be effectively improved.