IrTa-X mixed metal oxide (MMO) coating titanium anode was prepared by thermal decomposition process. The electrochemical performance of Ti anode was investigated by means of polarization curves. The surface morphology of the coating was observed by SEM. The relationship between the anode lifetime and coating thickness and the anode current density was studied. The results indicate that the Ti anode has the superior electrochemical performance and the longer lifetime. So the MMO anode will be the promissing auxiliary anode of impressed current cathodic protection for reinforced concrete structure.