Since the development of the Yangtze River Delta integration became a national strategy in 2018，the development of the Yangtze River Delta integration has been rapid and steady，achieving a win-win with the China International Import Expo（CIIE）. First，this report defines the connotation of regional integration and constructs an indicator system from four dimensions：economy，green development，public services，and innovation，to measure and analyze the current development status of the integration of the Yangtze River Delta. On this basis，the report believes that the CIIE provides a new opportunity for the high-quality development of the integration of the Yangtze River Delta. Therefore，the CIIE should be used as a lever to further promote the high-quality development of the integration of the Yangtze River Delta. Specifically，to provide new growth points，new driving forces，and new engines for the high-quality development of the Yangtze River Delta integration，we should further leverage the platform function of the CIIE，accelerate the digitization and digital industrialization of industries in the Yangtze River Delta，and amplify the spillover effects of the CIIE. At the same time，to empower the green development of the Yangtze River Delta，we should align with the special exhibition area of the CIIE，benchmark the latest green and low-carbon achievements，energy-saving and emission reduction technologies，and green development models in the industry，and green development models in the industry，and develop new quality productive forces according to local conditions. In addition，to accelerate the construction of the Yangtze River Delta innovation community，the hosting of the CIIE should be taken as an opportunity to promote the construction and sharing of public services in the Yangtze River Delta，and to integrate innovative resources through the CIIE.