The invention discloses an electrode structure of an air battery and a preparation method thereof, which can be divided into three layers of superposition and five layers of superposition according todifferent uses. The two metal layers are bonded and rolled on both sides of the oxygen precipitation catalytic reaction film respectively, and then pressed into air electrode sheets with prescribed thickness by a plate press under a certain pressure. The five layers are rolled together according to the structure of the catalytic film of oxygen precipitation of silver foam nickel mesh + silver foam nickel mesh + oxygen reduction active film + nickel foam nickel mesh, and then pressed into the air electrode sheet with specified thickness by a plate press under a certain pressure. The electrodechip has the advantages of high strength, long life, small resistance and high efficiency conduction. The invention solves the problems of difficult fabrication and forming of the air electrode in theprior art, low strength, large resistance, low current collecting and conducting efficiency, and overcomes the defects of instability, easy deformation, easy water permeability and short working lifeof the air electrode.