Abstract: Opening up to the outside world is China's basic national policy and the way to national prosperity and strength. The traditional model of open development has made great contributions in promoting high economic growth and thus helping to build a moderately prosperous society in all aspects, but it is difficult to adapt to the requirements of high-quality development in the new period of modernization. A high level of opening-up with a wider, broader and deeper opening as its main content, and an important mechanism to promote innovation, coordination, green and shared development, will undoubtedly play an important role in promoting high-quality development of the economy and advancing the construction of Chinese modernization. We should adhere to the correct direction of economic globalization, continue to magnify the advantages of opening up to the east, do a good job of opening up to the west, continuously expand the opening up of the service sector, build a high-standard network of free trade zones, and promote the formation of a new pattern of international and domestic dual-circulation development.