High density and metal bonded plastic functional composite materials with complex and delicate structures can also be prepared by the injection molding process. Density can be adjusted as required from 2-13 g/cm3, which can replace some traditional aluminum alloy, zinc alloy, stainless steel, and other materials with metallic texture. Its environmental advantage and shielding function of high-energy ray (X-ray, etc) make it suitable to replace the traditional lead metal alloy. It has high dimensional precision and excellent mechanical properties, which is suitable for processes such as turning, milling, drilling, and so on.