CNC rapid prototyping integrates the advanced technologies of computer-aided design,computer-aided manufacturing and computer numerical control to realize the computer 3D data model by cutting a block of entire material. After the work piece clamped one time, the numerical control system can control the machine tool according to the different processes to automatically choose and change cutting tool, automatically change the spindle rotating speed feed rates and the cutting tool comparative moving track against the work piece, also some other aided functions, to finish each work piece surface processes in turn, all the processes are automatically controlled by the program and not influenced by the human factors. Functional models with requirements of high precision high strength specified material and big size, also the visual models of high surface treatment requirements.Presently, at kaiao the major cnc equipments are from japan fanuc company, its three axis working range is x700mm\y400mm\z330mm, the main spindle rotating speed is 2400 rpm (2 or 3 times faster than the common), attaching the 21 or 14 cutting tools movable holder, location precision 0.010/300mm, machining precision up to 0.05mm.