Abstract:In the past 30 years, improving the maturity of project management is an important way for enterprises to improve the level of project management, However, in today"s rapid iteration of information technology and digital institutional environment, the relationship between the project management maturity and the enterprise project management efficiency is becoming weaker and weaker. Based on this phenomenon, this paper first analyzes the content composition and evolution of project management maturity and project management efficiency. Secondly, in view of the measures taken by enterprises to cope with the development of information technology and the formation of digital institutional environment, this paper puts forward the concept of enterprise project management information sharing capability, and analyzes its composition, connotation and value. Finally, this paper analyzes the logical relationship among project management maturity, project information sharing capability and project management efficiency, and constructs a conceptual model among them, and then explores the mechanism of improving project management efficiency in the context of digital environment. The research results enrich the project management theory under the digital environment, and have practical significance to enhance the efficiency of project management in the form of enterprise engineering and innovation project.