Abstract: Visualization of building models is an important way for digital modeling technologies to realize information exchanges and sharing among different specialties, while direct, efficient and accurate model display is a powerful guarantee for the successful completion of the projects.At present, Revit realizes the 3D region model by the function of "section box".But this function is affected by the size of the model and the limit of the configura-tion.In practical application process.we need to rotate the model view and stretch the boundaries of the section box repeatedly, which is inefficient.Based on those, the key points of the application of Revit model visualization technology are analysed.Based on the development of RevitAPI technology, a new way of displaing 3D view which is based on the spatial location is proposed.Then the key technologies are introduceed and some application examples of an assembly type steel structure are demonstrated.This method provides a reference for the development of other technologies about BIM software.