Nanobimetallic　particles　of　Au-Pt　alloy　were　synthesized　by　reducing　HAuCl4　and　H2PtCl4　mixture　solution　with　NaBH4.　UV-Vis　spectra,　transmission　electron　microscopy　(TEM),　and　X-ray　diffraction　(XRD)　results　revealed　that　the　alloy　was　single　phase　with　face-centered　cube　structure.　The　Au-Pt/Cysteine/glassy　carbon　electrode　was　prepared　by　self-assembling　nanobimetallic　particles　on　glassy　carbon　substrate　modified　with　cysteine　and　was　characterized　with　scanning　electron　microscopy　(SEM).　The　average　diameter　of　the　particles　was　12.6　mn.　The　electrochemical　performance　of　Au-Pt/　Cysteine/glassy　carbon　electrode　was　studied　by　cyclic　voltammetry　method.　The　result　showed　that　the　electrode　of　Au-Pt/　Cysteine　/glassy-carbon　had　good　electrocatalytic　activity　for　methanol　oxidation.