The Ru0.3LaxTi(0.7-x) electrodes are made by sol-gel method. The effect on chlorine evolution performance, strengthening life and surface morphology of electrodes doped with La2O3 are studied. Results: The titanium etched by acid and then alkali has a large specific surface area, while the titanium etched by acid had no obvious nanopore; The incorporation of La2O3 could reduce the film resistance and electrochemical transfer resistance of the electrode, enhance the conductivity of the coating; The electrode doped with 1% La2O3 coating has a smaller electrochemical transfer resistance than Commercial DSA under the same unit molar mass of Ru, which will reduce the cost of Ru; The electrode doped with 1% La2O3 has the highest reaction rate constant among the electrode doped with 0%La2O3, 2%La2O3 and 3% La2O3; The electrode doped with 1% La2O3 has higher life than the electrode doped with 2% La2O3 and 3% La2O3.