Abstract: Quantitative statistics is one of the most valuable application of BIM technology of great significance. Considering that the reinforcement engineering itself is incomplex and changeable structure, involving many relative atlases and codes, as well as all different kinds and parameters, the Revit software is functional limited in the graphical display of reinforcement engineering, leading to the lack of development and solution of BIM reinforcement calculation. In response to the above problems, based on the secondary development on Revit, this paper realizes 3D reinforcement quantitative statistics to provide scientific and accurate data support for the statistics of reinforcement materials, which has broken through the technical bottleneck, and deeply excavated the application value of BIM in reinforcement engineering.