With the popularization of information technology, Civil Aviation Administration strongly advocates the construction of "Four Characteristics Airport". BIM and digital technology are most widely used in "Smart Airport". Meanwhile, in the field of civil aviation airport construction, the EPC mode is vigorously developed, and the consortium led by the design unit will become the future development trend.This paper relies on design and construction general contracting project of Beihai Airport apron expansion project, applies BIM and digital technology to all management elements of general project contracting, which played a role in promoting effective integration of design and construction, ensuring engineering quality and the safety of airport construction without suspension, improving the efficiency of general contracting management, and exactly implementing the responsibility of the design enterprise to take the lead and manage the project general contracting project. Practice has proved that BIM and digital technology can effectively solve the safety pressure of non-stop construction of EPC project of airport reconstruction and expansion, and give full play to the advantages of the project general contract management mode, which can be used as a reference for similar airport engineering projects.