struction model be parameter-driven model after being imported into conventional CAD system, CSG/B-Rep hybrid mode is applied to represent the reverse reconstruction model, and a XML-based description of data exchange format is proposed, which contains all required parameter information of CAD model. After second development of CAD system, the XML files can be imported into CAD system, and accomplish the data exchange between reverse reconstruction models which are represented by CSG/B-Rep hybrid expression mode and conventional CAD system, which expands the reconstruction signifi cance of reconstruction model. Finally, the method is verifi ed by an example of data exchange between reverse reconstruction model and CATIA system.