China International Import Expo（CIIE），as the world’s first national-level exhibition themed on imports，has continuously introduced high-quality consumer goods and services into the Chinese market for four years. Innovative models of imported commodity circulation formats based on the CIIE are also emerging，and the effect of the CIIE in promoting Chinese consumption upgrading is becoming more and more obvious. Based on reviewing the existing literature on consumption upgrading，this report firstly defines the connotation of consumption upgrading，and analyzes the actual characteristics of the current development of the consumer market. On this basis，in combination with the practical development of the CIIE in promoting consumption upgrading，this report proposes that the effect of the CIIE in promoting consumption upgrading is reflected in four aspects，that is promoting quality consumption，service consumption，consumption digitization and consumption internationalization. In addation，the mechanism for promoting consumption upgrading is embodied in three aspects，that is improving the system，giving full play to the role of the main body of circulation，and smoothing supply and demand information channels. Finally，focusing on the requirements of promoting to build a new development pattern，it is proposed that the channel spillover effect，resource agglomeration effect and innovation promotion effect of the CIIE should be further utilized to continuously promote consumption upgrading.