CeO2　+　SnO2　binary　oxide　coated　titanium　anodes　were　prepared　by　the　sol-gel　method.　Annealed　at　various　temperatures,　the　microstructures　of　the　anodes　were　investigated　by　XRD　and　TEM.　The　results　indicate　that　nanoscale　coatings　can　be　obtained　by　controlling　the　preparation　condition.　When　the　molar　fraction　of　SnO2　is　83%,　the　main　component　of　the　coating　is　(Sn,　Ce)O2　solid　solution　with　rutile　structure.　When　the　molar　fraction　of　SnO2　is　44%,　the　main　components　of　coating　are　the　(Sn,　Ce)　O2　solid　solution　with　rutile　structure　and　(Ce,　Sn)O2　solid　solution　with　fluorite　structure.　When　the　molar　fraction　of　SnO2　is　17%,　the　main　component　of　the　coating　is　(Ce,　Sn)O2　solid　solution　with　fluorite　structure.　Annealed　at　higher　temperature　than　450°C,　CeO2　is　found　in　the　coating　containing　83%Sn,　and　there　is　not　SnO2　in　the　coating　containing　83%Ce,　which　suggests　that　fluorite　(Ce,　Sn)O2　has　higher　thermal　stability　than　rutile　(Sn,　Ce)O2.　When　the　molar　fraction　of　SnO2　increases,　the　dispensability　of　the　coatings　is　improved　greatly.