After Cold war, the trend of economical globalization has led the region cooperation development. As China is going to focus on economic growing, its good neighborhood policy is most important especially in East Asia.In 2002, ASEAN and China decide to build up a free trade area between each other. The China-ASEAN free trade area is expected to be an important economic area in 2010. The study is using Neo-functionalism to analyze China¡¦s policy in East Asia.To explore the China-ASEAN Free Trade Area ,its circumstance and development.