The above ground part of the International Pavilion project of Beijing 2019 World Expo is composed of 94 "umbrellas" in steel structures, which is large in volume, and proposes high construction civilization requirements in really tight construction period. The application of BIM technology in the whole life cycle of the project has achieved great achievements in many aspects, including deepening design, construction planning, organization design, target management, effect design, and etc., which has significantly improved management efficiency, saved construction period, and reduced project operation cost. The BIM application has provided strong technical guarantee for the smooth implementation, cost reduction and efficiency increase of the International Pavilion project, which also provides a successful engineering for the realization and development of BIM Technology.