Against the backdrop of “real-digital integration” becoming a national strategic priority，how to guide advanced technologies to effectively embed into the real industry system through institutional open platforms has become a core issue in promoting high-quality development. This article focuses on the key functions of the China International Import Expo（CIIE）in promoting the deep integration of the real economy and the digital economy，and systematically analyzes its institutional role and mechanism evolution as a cutting-edge technology hub，industry empowerment platform，and builder of open innovation ecology. By summarizing its typical practices in five key scenarios of intelligent manufacturing，smart healthcare，smart agriculture，smart retail，and smart logistics，this article reveals how the CIIE builds a complete transformation chain from technology input to institutional implementation with the main line of “display transaction pilot expansion”. Research has shown that the CIIE has formed an institutionalized platform mechanism characterized by high-quality displays，precise supply-demand matching，multi-level policy linkage，and rule coordination，playing an increasingly prominent strategic engine role in promoting the transformation of the real-digital integration system. The article concludes by proposing future development directions such as enhancing platform functionality，optimizing integration path design，and improving institutional integration systems，in order to provide policy references and mechanism support for the deepening of real number integration.