BMC products have the features of low density, heat preservation and insulation, stable sizes, sound insulation, resist erosion of acid and alkali, non magnetic, good antioxidant, high intensity, good toughness, great looking, good watertightness. Their using period can be as long as more than 15 years. BMC molds can evidently improve production efficiency of BMC products, take good use of raw material, and reduce production cost and environment contamination. The adoption of CAD/CAM/UG technic in design and high speed milling tech in processing provide condition to make high efficiency and quality molds.