To electrolysis saturated salt aqueous solution of the system of chlorine and caustic soda from the chemical industry are known as the chlor-alkali industry.The production technology has over 100 years of history. Chlor-alkali production process of development, has tried platinum, iron oxide, carbon, artificial graphite, but the results were not too satisfactory. Precious metals and the use of mixed oxide coated titanium electrodes, there are many advantages. In the production process, anode directly touch with the very lively chemical properties of wet chlorine ,the new eco-oxygen, hypochlorite and hydrochloric acid and so on.Therefore anode material should have a strong chemical resistance, chlorine too low potential, good conductivity, high mechanical strength, easy processing, as well as the low price.