The　thermal　decomposition　method　was　used　to　prepare　composite　electrodes　of　the　Ruthenium　oxide-Iridium　oxide-Graphene　(RuO2-IrO2-G).　Scanning　Electron　Microscopy　(SEM),　X-ray　diffraction　analysis　(XRD),　and　electrochemical　tests　were　used　to　study　the　influence　of　different　annealing　holding　time　on　the　surface　morphology,　phase　composition,　and　capacitive　performance　of　the　coatings.　The　results　showed　that　more　and　more　RuO2,　IrO2　nanoparticles　were　observed　on　the　surface　and　cracks　of　the　coating　as　the　annealing　holding　time　increasing.　The　RuO2-IrO2-G/Ti　electrode　was　obtained　by　annealing　for　5　h.　The　coating　of　the　electrode　consists　of　a　certain　amount　of　amorphous　phase　and　nano-crystalline　phase,　and　it　had　good　electronic　conductivity　and　ionic　conductivity.　At　the　same　time,　the　electrode　was　prepared　at　5　h　had　the　largest　specific　capacitance　of　778.46　F/g,　which　increased　by　430.89　F/g　than　the　electrode　was　prepared　at　1　h.　In　addition,　the　electrode　also　had　superior　capacitance　performance,　capacitance　retention　and　power　characteristics.