Polishing device for machining mechanical parts

The utility model relates to the technical field of machining of mechanical parts, in particular to a polishing device for machining of mechanical parts, which comprises a base, a shell and polishing components arranged on two sides of the bottom of the shell, a supporting table is arranged on the base, a positioning disc is arranged above the supporting table, and the polishing components are arranged on the supporting table. The two sides of the bottom of the shell are each provided with a self-adaptive mechanism used for adapting to the shape of a part, an adjusting mechanism used for adjusting the position of the polishing assembly in a displacement mode is arranged in the shell, each self-adaptive mechanism comprises a transmission box fixedly connected to the two sides of the bottom of the shell, and an equipment box is arranged at the bottom of each transmission box; the polishing assembly is arranged on the equipment box, the transmission box is used for adjusting the angle of the polishing assembly i