Abstract: Advanced the concept of BIM and its successful application in the project by more and more attention, steel detailing design software STXT deepen their thinking on development, the use of 3D model data as the core, parametric modeling and read PKPM design model to build a complete model and the detail design.3D models show real easy real － time view, model checking, automatically generated by the 3D model for a full set of construction drawings and project the amount of statistics, this article will focus on the characteristics described in detail.