Abstract: Powder injection molding(PIM)is a kind of net-shape forming technology for manufacturing of small size and complex-shaped production.Compared with the traditional processing technology,although PIM has great technique and cost advantages,many problems exist in it.Considering the characteristics of PIM,this paper describes the procedure of feedstock,injection molding,debinding and sintering in which parameters influence the quality of the products and the application of PIM in manufacturing complex-shaped components from metal and ceramic materials.