Abstract:Based on the worldwide researches on BIM adoption and diffusion, starting from the theory of neo-institutionalism, the organization field of water conservancy and hydropower projects is put forward, and its characteristics are analyzed. Then, using the technology-organization-environment(TOE)framework and the matching theory, the main influencing factors for BIM diffusion in the organization field of water conservancy and hydropower projects are discussed, and a whole theoretical analysis framework is formed. The analysis shows that the influencing factors for BIM diffusion in the organization field of water conservancy and hydropower projects mainly include the technical factors such as comparative advantages, compatibility and complexity, the organizational factors such as organizational communication, resource readiness and support from senior leaders, and the environmental factors such as institutional environment and market environment.