Dynamic three-dimensional shape simulated for dragline is studied. Virtual prototype analysis technology is used to design dynamic three-dimensional shape's model,it eddectively combines CAD/CAM with Dynamic three-dimensional shape simulated.The paper puts forward that the mechanical processing mode can be used to establish parts model and simplified desingning the process of prototype.The dynamic three-dimensional shape simulated may be applied to check some problems in CAD/CAM and find a way out of the problems,it may shorten ...