The application of BIM technology, on one hand, is to implement the national technical and economic policies and promote to the informatization of engineering construction, and on the other hand, is to improve production and economic efficiencies of engineering construction enterprises. This paper mainly focuses on the introduction of the application of BIM technology in the China Pavilion project for the 2019 International Horticultural Exposition in Beijing during the deepening stage, processing stage and construction stage. All design results are optimized through the BIM technology, together with the integrated BIM 5D platform, 3D laser and scanner digital processing applications. The application of BIM is aiming to create a fine expression of traditional architectural art through scientific and technological means, to help the project quality management staying at high level in domestic industry, and to provide valid reference plans for building similar projects in the future.