At present, metal 3D printing has now become the industry's first growth rate, and it is widely used in various fields of daily life, mainly in the fields of industry, aerospace, automotive, medical and jewelry. The common characteristics of these fields are Individualized, rapid manufacturing in small batches. Relatively speaking, the application of 3D printing in the medical industry has developed rapidly, while the development of other fields has been slower. The main reason is that the medical field makes full use of the characteristics of personalized manufacturing of 3D printing, and requires more mechanical strength and efficiency of 3D printed products. Low, other fields have high requirements on the internal quality, mechanical strength, molding speed, and matching accuracy of printed parts.