Since the birth of MIM technology, a variety of MIM process paths have been formed with different binder systems, and various degreasing methods have been developed. The degreasing time was shortened from the first few days to the current hours. From the degreasing step, all the degreasing methods can be roughly divided into two categories: one is the two-step degreasing method. The two-step degreasing method includes solvent degreasing + thermal degreasing, siphon degreasing - thermal degreasing, and the like. The one-step degreasing method is mainly a one-step thermal degreasing method, and the most advanced one is the amaetamold method. Several representative MIM degreasing methods are described below.