3D printing (3D printing) is a kind of rapid prototyping technology. It is a technology that builds objects based on digital model files and uses bondable materials such as powdered metal or plastic to print layer by layer.

3D printing is usually achieved by using digital technology material printers. In the past, it was often used in mold manufacturing, industrial design and other fields to make models. Now it is gradually being used in the direct manufacturing of some products. There are already parts printed using this technology. The technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, guns, and other fields.