3D printing (3DP) is a kind of rapid prototyping technology. It is a technology based on a digital model file and uses a powdery metal or plastic adhesive material to build an object by layer-by-layer printing.

3D printing is usually implemented using digital technology material printers. Often used in mold manufacturing, industrial design and other fields are used to manufacture models, and then gradually used in the direct manufacture of some products, there are already printed components using this technology. The technology has applications in jewelry, footwear, industrial design, construction, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and other fields.