Ternary　IrO2-Ta2O5-SnO2/Ti　anodes　with　different　molar　percentage　of　SnO2　were　prepared　by　thermal　decomposion　method.　The　crystal　structure　and　the　surface　morphology　were　characterized　by　means　of　X-ray　diffraction　(XRD)　and　scanning　electron　microscopy　(SEM).　Accelerated　life　test　was　performed　to　examine　their　anticorrosion　properties.　It　is　suggested　that　the　solid　solution　in　crystal　structure　and　the　compact　surface　in　the　appearance　can　help　to　improve　the　anticorrosion　property　of　the　coatings.　The　high　content　of　SnO2　causes　SnO2　precipitation　in　the　coating,　which　deceases　greatly　the　anticorrosion　property.