BIM+5G digital management proposed in the paper refers to the establishment of BIM project digital control platform and 5G data capture AI analysis platform by taking full advantage of 5G's large bandwidth, low latency, wide connection, mobility and other characteristics. Taking BIM technology and AI artificial intelligence technology as the core technology, this paper combines the Internet of Things, cloud computing, big data and other new generation information technology to change the traditional construction site management interaction, working mode and management mode, improve the smart construction site and break through the fixed mode. Through Introducing artificial intelligence into project management to realize all-round visual and intelligent management of human-machine material method environmental testing. Conducting research on Shenzhen Yuecai City (North Plot) project, this paper introduces the BIM+5G digital management system and its application in details, which provides direction for the construction of BIM+5G smart construction sites for similar projects.