The invention relates to an anti-oxidation composite membrane electrode, which comprises a substrate. The substrate is provided with a transition layer, a conducting layer and a protective layer in turn. The transition layer is made of a metal material (such as chromium, aluminum, titanium, molybdenum, niobium, tantalum, nickel and copper) or a compound material (such as indium oxide, zinc oxide, nickel oxide, vanadium oxide, silicon oxide, aluminum oxide, silicon nitride, aluminum nitride, and silicon oxynitride). The conducting layer is made of silver with high electrical conductivity, a silver-containing alloy or a mixture containing silver metal. The protective layer is made of a metal material (such as the chromium, the aluminum, the titanium, the molybdenum, the niobium, the tantalum, the nickel and the copper) or a compound material (such as zinc sulfide, the zinc oxide, tin dioxide, tungsten oxide, the indium oxide, the nickel oxide, the vanadium oxide, molybdenum oxide, titanium oxide, chromium oxide, niobium oxide and tantalum oxide). The membrane electrode can bear high-temperature thermal treatment and is not oxidized, thereby avoiding electrode oxidation in a sealing process, reducing the resistance of a flat display electrode and improving the display quality of a flat display.