After careful deliberation and through rounds of talks, the Chinese mainland and Taiwan signed the Cross-Straits Economic Cooperation Framework Agreement in 2010. This agreement is viewed by many across the straits and around the world as an agreement with great implications not only for economic issues, but also for political interactions between the two sides. Moreover, as the two sides of the ECFA are WTO members, legally, the relevant rules concerning free-trade agreement under of the WTO regime are applicable to the ECFA. This article will give a brief analysis on the economic, political and legal aspects of the ECFA.