3_TPS_RRR virtual parallel machine prototype solid modeling was made and machine body were analyzed using Pro/E. The entity modeling on the three characteristics of a parallel machine tool modeling was established using Pro/E. The structure including hooker hinge, moving platform, static platform, scalable flu, the drive-structure and double-cross were designed. At last, used Pro/E body constraints to simulate 3_TPS_RRRs assembly and then get the virtual prototype solid model. Virtual prototype designed by Pro/E can cut design and manufacturing cycles, increasing productivity. 