Abstract: ccording to the actual requirements of engineering design, combined with Revit secondary development technology, this paper realizes the function of quickly establishing three-dimensional models in Revit based on architectural and electromechanical CAD drawings. It significantly improves Revit modeling efficiency. It is suitable for use in existing CAD drawings and the need to establish Revit models, in order to meet the requirements of BIM follow-up pipeline collision detection, detailed design, operation management.