The invention belongs to the technical field of aluminum-plating films, particularly relates to an aluminum-plating anion-cation membrane, and further discloses a preparation method of the aluminium-platng anion-cation membrane. Based on an existing preparation method of the aluminum-plating anion-cation membrane, by using a volatile solvent containing metal oxide nano-particles as boundary filling of a shielding layer, and through volatilization of the volatile solvent, the metal oxide nano-particles are deposited at the boundary of the shielding layer; through a higher specific surface area of the metal oxide nano-particles, a boundary line of an anion membrane and a cation membrane in the aluminum-plating process is more clear; meanwhile, a method for adding silicon dioxide nano-particles in perfluoropolyether oil is utilized, so that the exclusiveness of the shielding layer on metal deposition in the aluminium-plating process is further enhanced, and the transparency effect of the anion membrane is further enhanced.