Metal powder injection molding technology is a combination of plastic molding technology, polymer chemistry, powder metallurgy technology and metal materials science and other interdisciplinary products, the use of mold injection molding billets and through sintering quickly produce high-density, high-precision, three-dimensional complex shape of structural parts. It is a new revolution in the manufacturing technology industry that the design ideas can be quickly and accurately materialized into products with certain structure and functional characteristics, and parts can be directly mass-produced. The process technology not only has the advantages of conventional powder metallurgy process fewer processes, no cutting or less cutting, and high economic benefits, but also overcomes the shortcomings of traditional powder metallurgy process products, uneven materials, low mechanical properties, not easy to form thin walls, complex structure, especially suitable for mass production of small, complex and with special requirements of metal parts. Process binder → mixing → injection molding → degreasing → sintering → post-treatment.