The present invention relates to a method of manufacturing an aluminum-air battery with improved energy efficiency, comprising: preparing an anode made of aluminum, preparing an electrolyte by mixing a corrosion inhibitor, a gelling agent, and an ionic polymer in an aqueous KOH solution, and an electrolyte Preparing an absorbent membrane, preparing a separator by applying an electrolyte to the electrolyte absorbing membrane, preparing a porous metal body, applying a catalyst to the surface of the porous metal body to prepare a cathode, and an anode, a separator, and a cathode It includes the step of sequentially laminating to complete the aluminum-air battery.
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