Abstract: Based on the background of the change of regional integration pattern induced by the withdrawal of TPP from the United States, this paper explores the formation mechanism of CPTPP and its subsequent impact.CPTPP negotiation process generally follows the evolutionary logic of “driven by external pressure, internal pressure and internal pressure”:externally, US trade protectionism is on the rise, China and its RCEP value are highlighted; internally, Japan actively plays a coordinating and leading role, and other member countries actively participate based on economic logic.Internal and external forces interact to build a dynamic mechanism to drive CPTPP negotiations.With the implementation of CPTPP agreement, its strong expansion momentum will inevitably impact the integration pattern of “two-track competition”, forcing the Asia-Pacific integration process to follow the CPTPP path set by Japan and Australia;at the same time, its high-standard investment and trade rules better meet the needs of the global value chain, set a benchmark for the formulation of the new generation of world economic rules, and promote the evolution of the international economic order in favor of developed countries.

Key words: Asia-Pacific Economic Integration, CPTPP, RCEP