SnO2-TiO2　thin　films　were　deposited　on　the　activated　glassy　carbon　electrodes　by　vacuum　coating　method.　Au-Pt/SnO2-TiO2/GC　composite　electrode　was　prepared　by　reducing　HAuCl4　and　H2PtCl6　mixture　Solution　and　sediment　Au-Pt　bimetallic　nanoparticles　successively　on　the　SnO2-TiO2/GC.　The　effect　of　SnO,-TiO,　film　support　on　the　electrocatalytic　properties　of　Au-Pt　nanoparticles　was　characterized　via　cyclic　voltograme　method.　The　morphological　and　structural　properties　of　Au-Pt　nanoparticles　self-assembled　on　SnO2-TiO2　film　were　characterized　via　Scanning　Electron　Microscope　and　X-ray　Photoelectron　Spectroscopy.　The　results　show　that　the　compact　and　uniformed　10　nm　Au-Pt　nanoparticles　were　self-assembled　on　SSnO2-TiO2　film.　The　ability　of　anti-CO　poisoning　was　enhanced　with　the　function　of　SnO2-TiO2　support.　The　form　of　Au-Pt　alloy　enhanced　the　electrocatalytic　oxidation　of　methanol　in　acidic　system.　Furthermore,　the　increase　of　d　vacancy　with　the　function　of　SnO2-TiO2　support　improved　the　stability　and　catalytic　property　of　Au-Pt　bimetallic　nanoparticles.