Abstract: Data base of shaft's structure information is constructed to store shaft' s general information, load information and technical references rationally and design the special search program for these information data. The interactive and parameterized structure design and intensity check for shafts realized adopting object-oriented programming method and using Delphi to set up Graphics user are interface. In this system， intensity check and accurate check of shafts can be done respectively according to crankle-synthesized intensity calculation method and fatigue intensity calculation method. So the interactive structure design and intensity check of shafts.