This thesis mainly analyzes the changes in China's international trade patterns and policies. And the China-ASEAN Free Trade Agreement is the main research object. Through the analysis of literature and trade data, it was found that after the implementation of the policy of reform and opening up in 1978, China began to strengthen trade cooperation with other countries and adopted bilateral free trade agreements as the main way to develop international trade. Moreover, with the development of international trade, China's role in international trade after the 1990s has become increasingly important.