Abstract: The establishment of Postal Savings Bank of China attracts wide attention from all parties.In this paper,the author applies the oretical and empirical analysis methods to discuss sustainable development issue of the Postal Savings Bank of China,holding the view that Postal Savings Bank of China can implement its "two step" strategy by improving system construction,increase product innovation and strengthen financial institutions cooperation to realize its positioning strategy on market,operation and management,and sustainabledevelopment.