SnO2　thin　films　were　deposited　on　activated　An　foil　by　vacuum　coating.　Au-Pt/SnO2/Au　composite　electrode　was　prepared　by　reducing　HAuCl4　and　H2PtCl4　mixture　solution　and　self-assembling　Au-Pt　nanobimetallic　particles　successively　on　the　SnO2/Au.　The　composite　electrode　was　characterized　by　SEM,　TEM,　XPS　and　cyclic　voltammetry　method.　The　results　show　that　nanobimetallic　particles　are　well　distributed　and　the　average　diameter　of　the　particles　is　about　25　nm.　The　SnO2　as　a　modifying　layer　binds　with　Nanobimetallic　particles　via　coordination　bonding.　The　electrode　of　Au-Pt/SnO2/Au　composite　electrode　has　good　electrocatalytic　activity　for　methanol　oxidation.