With the development of the times and social progress, 3D printing technology of our country gradually began to rise, is a kind of rapid prototyping technology in the present stage of our country, has gradually entered people's life, aroused people's interest and attention, and has been in a number of areas for the use of. The important point is that the current mold manufacturing industry is the basis of our national industry, mold manufacturing industry has become an important industry in the national economy of our country, has a very good position. 3D printing technology in the mold manufacturing industry in the application of the degree of deepening and expanding, has become a strong momentum in the future development of our country. The author first analyzes the working principle of 3D printing technology, development advantages and the characteristics of mold industry in the future, and the use of 3D printing technology mold related examples to analyze the specific manufacturing, finally puts forward the existing 3D printing technology problems and future development direction.