The surgery building of Hunan Aerospace Hospital is a wedge-shaped architecture, in which exists some beam-column joints intersected with beams from diverse directions, where the steel bars are densely distributed and highly complexed. During the construction progress, the project department adopted BIM technology, through using methods like layered coloring and reasonably determining the reinforcement parameters, thus finally achieves achieve the purposes of accurately positioning steel bars and colored displaying under 3D mode, as well as construction schedule management and optimization of steel bar length. All these work has improved the construction quality, and also increased the utilization ratio of raw materials as well.