Aiming at the problem of exchanging data reconstruction between heterogeneous CAD systems, a method based on reference topological entity is proposed to permanently name the reference topological entity of the modeling history node into an intermediate topological entity that can be accurately characterized. The current reconstructed node entity is completely recorded and accurately characterized using the intermediate topological data. In order to realize the mapping of the intermediate reference topological entity to the permanent topological name in the target CAD system, the purpose of data model reconfiguration between different CAD systems is achieved.