The changing international economic and trade rules and China’s response is the theme of the study of China’s international economic law in 2019. The WTO reform，the reform of the international investment dispute settlement mechanism and the Sino-U.S.Economic and trade frictions showed that the international economic and trade rules were experiencing unprecedented challenges and changes. The proposal of the “Community of Shared Future for Mankind” and the deepening practice of the “Belt and Road” initiative have brought impetus originating from China to the changing international economic and trade rules. At the same time，the adoption of Foreign Investment Law and the exploration of establishing free trade ports reflected China’s proactive adjustment at the domestic level to dealing with the changes in international economic and trade rules. The study of China’s international economic law in 2019 mainly focused on the abovementioned aspects and achieved some gratifying results. Since the International economic and trade rules will be constantly changing and developing，how to deeply grasp the trend of international economic and trade rules and make theoretical contributions to China’s response requires the unremitting efforts of the international economic law community.