Abstract: The construction of large and complex projects often involves a large amount of work, complex procedures, and difficult construction management. Traditional management models are no longer suitable for the management requirements of construction projects in the new era. With the rapid evolution of digital technologies such as cloud computing, big data, the Internet of Things, and artificial intelligence, digital management based on BIM (Building Information Modeling) technology is becoming increasingly mature. Based on the Shanghai Midea Global Innovation Park project of China Construction Eighth Engineering Division, this paper explores the application of BIM technology in the full process digital management of large and complex projects from three aspects: green and low-carbon construction planning and implementation, visual management, and smart procurement, focusing on the operational mechanisms of three major systems: digital construction, digital operation command platform, and digital supply chain. Practice has shown that BIM technology and digital management can effectively optimize and improve the management process of large and complex projects, enhance management level and quality.