The U.S. sub-prime mortgage crisis, which has broken out in 2008,caused great impact on the countries and economies around the world, many countries have carried out a profound reflection in dealing with the financial crisis. The dollar's role became lowered in the crisis. China, as a large developing country in the world has been growing increasingly in the current financial crisis and made a tremendous contribution to the stability of the global economy. Thus, Many people believe that China has possessed some basic conditions of the internationalization of the RMB. Internationalization of the RMB is the Yuan can cross borders outside the circulation, was generally recognized as an international valuation, the process of settlement and reserve currency. Now RMB has been accepted by many countries as payment and settlement. Although the circulation of RMB outside does not mean the RMB has international, but the expansion of RMB circulating outside the end will inevitably lead to the internationalization of the RMB, making it to be one of the international currencies. However, at present, the level of internationalization of the RMB is relatively low. So there are still some difficulties on the path of internationalization of the RMB at this stage. Barriers to internationalization of the RMB are as follows: domestic financial markets showed a lower level of development, central bank independence is not high, the economic power and comprehensive national strength is still relatively weak. In order for a currency to be accepted and circulated globally, its compatibility, stability, liquidity and freedom of convertibility should be guaranteed. The current liberalization of China`s financial system is important in ensuring this. If the RMB is accepted as a key currency, China would experience a seigniorage effect, lessening the cost of maintaining foreign exchange reserves. Proposals for the internationalization of RMB to strengthen the economic base of internationalization, gradually improve the RMB exchange rate market and the capital markets system, guide the structural transformation of international trade, the gradual increase in international liquidity and the progressive realization of the RMB convertibility under capital account and so on. Although at this time RMB is not able to fully implement all functions as an international currency does, but with the development of China's economy and political system, the improvement of China's comprehensive national power, RMB internationalization will be achieved in the future.