SLA is an additive manufacturing process through the UV laser scanning and rapid solidifying of the liquid tosensitive resin layer by layer to build up the 3D model. The raw material we used is 14120 resins which produced by US SOMOS company. This materials is similar to ABS which has good toughness and high printing precision. The tolerance can be controlled at +-0.05mm, and it is also feasible for complicated products and any curve surfaces.