3D printing service is a common name for additive manufacturing technology. It is a technology that uses discrete materials to build objects layer by layer based on 3D CAD design data. Compared with traditional material removal methods and material forming methods, 3D printing is a bottom-up material accumulation manufacturing process. It has been gradually developed since the 1980s. It is also called 3D printing technology such as rapid prototyping and layered manufacturing. The development and maturity is one of the important signs of the third industrial revolution.