Based on the research into relevant open-economy theories and the content of an open economy, and taking the case of Chongqing for example, this paper proposes five critical aspects in expanding an inland open economy: to build open platforms, to construct external traffic links, to innovate the industry development pattern, to enhance the comprehensive level of support services, and to innovate the system and mechanism for opening-up. Then in terms of developing the future inland open economy, the article argues to foster an open economy culture, strengthen the various elements of guarantee, and further perfect the foreign-related economic management system and mechanism.