The powder metallurgy sintered plate is a porous material having a rigid structure formed by using a stainless steel powder as a raw material by molding and high-temperature sintering. The pressure resistance is high, but the pore structure is composed of regular and irregular powder particles, so the porosity is small, the amount of dirt is small, the powder particles are easy to fall, and once the force is uneven during use, the deformation of the disk is easy. Cracking.