The invention discloses a preparation method of a corrosion-resistant electric copper wire and relates to metal anti-corrosion materials. The preparation method comprises the steps that the surface is cleaned, anti-corrosion treatment is conducted; and the electric copper wire subjected to anti-corrosion treatment is cleaned through a solvent and dried, and thus the corrosion-resistant electric copper wire is obtained, wherein the solvent adopts water or ethanol. By conducting anti-corrosion treatment on the surface of the electric copper wire, the surface of the electric copper wire is prevented from being corroded, the salt and alkali resistant capability of the electric copper wire is improved, and the service life of the electric copper wire is prolonged.