Carrying disc positioning device of multi-column high-precision polishing machine

The invention relates to polishing equipment, in particular to a carrying disc positioning device of a multi-column high-precision polishing machine, which comprises a lower disc and at least two upper discs which are arranged on a machine body of the polishing machine, each upper disc is correspondingly provided with a carrying disc, and the machine body is provided with a center positioning assembly and a plurality of outer side positioning assemblies. When a plurality of carrying discs provided with parts to be polished are placed on the lower disc, the center positioning assembly is placed in the center of an array of the carrying discs from top to bottom, and then each outer side positioning assembly positions the corresponding carrying disc between the outer side positioning assembly and the center positioning assembly inwards from the outer side of the lower disc. And each loading disc is clamped into the corresponding upper disc by moving the upper disc downwards. The center positioning assembly and t