Faced with the global economic downturn and the continuous spread of COVID-19 epidemic, the uncertainty and instability of the international political and economic situation has increased. Based on theoretical logic and historical experience, it is not only the irreversible trend but also the inherent requirement of China's sustainable development of economy to build a new domestic and international dual cycle development pattern with domestic cycle as the main body, emphasizing linkage cycle, active cycle and dynamic cycle. In essence, the key to the formation of the new pattern lies in building a dual cycle endogenous power and fostering new advantages in international cooperation and competition. Specifically, it is to rely on the national strategy, take advantage of China's super large-scale market, multi-level consumer market and unified large market, to create a dual cycle endogenous market power. This need coordinated work which includes independent innovation as the core, and manufacturing service as the competitive new advantages, and the digital economy as a new opportunity to create a dual cycle industry support role. Moreover, it is important to improve the business environment, foster a dual cycle corporate dominant position, and form a high-level dynamic balance with higher quality supply and more dynamic domestic demand.