The paper presents a kind of quickly designing system's structures for electric heater.The interface and data communication between CAD system and PDM/ERP software,and the parameterized designing method based on customized product are studied.The application of developing method on CAD software is expounded,which uses SQL Server database and multi-documents parameterized designing technology.The whole system bases on AutoCAD platform and achieves integration of optimization-computation,parameterized drawing...