关键词: 进一步全面深化改革, 制度建设, 主要动因, 丰富内涵, 实践路径 

Abstract: The Third Plenary Session of the 20th Central Committee of the Communist Party of China emphasized the commitment to the main task of institutional building in further comprehensively deepening reform. Clarifying the main motivations, rich connotations and practical pathways of the commitment to the main task of institutional building in further comprehensively deepening reform, deepening the understanding of the interactions between the reform and institution and its inherent laws，and accurately understanding its theoretical logic, historical logic and practical logic, are of great significance for improving the effectiveness of modern governance and highlighting the advantages of the socialist system with Chinese characteristics in the new era and new journey, which will be conductive to providing strong institutional impetus and institutional guarantee for the Chinese path to modernization.

Key words: further comprehensively deepen reform, institutional building, main motivations, rich connotations, practical pathways