The traditional design concept of bolt assemblage is broken,and the screw the threaded hole,the gasket,the boss(or the dimpling)are regarded as a whole.Based on database and with the help of VC++,the design of bolt assemblage can be accomplished quickly and the interface file of AutoCAD which can be opened by AutoCAD2004 is generated.This design concept can free the designers from the boring bolt assemblage design and make them focus on other important tasks.