Ordered　intermetallic　PtBi　had　been　synthesized　by　are-melted　and　then　sintering　treatment.　The　electro-oxidation　of　liquid　formic　acid　on　PtBi　was　investigated　at　room　temperature　by　cyclic　voltaininetry　and　chronoamperometry.　The　results　are　compared　to　those　at　a　polycrystalline　platinum　electrode　surface.　At　PtBi　surface　the　onset　potential　for　formic　acid　oxidation　is　shifted　negatively　by　over　250　mV　and　the　current　density　at　the　PtBi　electrode　is　about　ten　multiple　higher　than　that　of　Pt　electrode.　XRD　and　XPS　technologies　had　been　used　to　investigate　the　crystal　structure　and　electron　effect.　We　propose　that　formic　acid　decomposition　on　PtBi　favors　the　reactive　intermediate　route　and　is　not　very　much　affected　by　the　CO　intermediate　compared　with　Pt　accordliv　to　the　results　of　electrochemical　test　and　ex-site　FHR　test.