Abstract: Taking the T2 terminal building of Mianyang Airport as an example, this paper applies BIM + intelligent construction site to provide personnel safety guarantee for non-stop flight of project construction. Using AI algorithm, the labor cost is reduced and the management efficiency is improved. After modeling the production components through BIM technology, the construction process of the components is simulated by MR mixed reality technology to guide the construction. With the help of 3D laser scanning equipment, the target entity data is collected to provide accurate data support for the re-creation of BIM model. The BIM intelligent robot is used to set out the whole process of the line, automatically align and track the measurement, reduce the human error, and realize the digital operation. Through the integration and application of BIM + intelligent construction technology in this project management, it reflects the accuracy, reliability, efficiency and convenience brought by digitization and integration.