Laser Layered Manufacturing is a Rapid Prototyping (RP) technology. RP is an advanced digital manufacturing technology with high flexibility, adaptability and speed. It is directly driven by CAD-model and rich in material selection. Since the late 1980s, RP has become one of the most important modern manufacturing technologies. Laser Layered Manufacturing technology includes the Selective Laser Sintering (SLS), Stereo lithography Appearance (SLA), Laminated Object Manufacturing (LOM), etc.