A polyurethane polishing disc includes a stainless steel chassis with a disc-shaped structure, a mounting disc made of PVC, and a polyurethane polishing skin. A circular mounting groove is formed inside the chassis, and a plurality of cones are fixedly welded on the bottom surface of the mounting groove. Anti-slip nails; the mounting plate is fixedly and adhesively installed inside the installation groove, and the anti-slip nails are embedded in the bottom of the installation plate; a ring-shaped array on the top surface of the installation plate is provided with a plurality of square strip-shaped fixing grooves; The polyurethane polishing leather is folded into an annular concave-convex structure, the annular concave-convex structure includes an arc-shaped convexity and an arc-shaped convexity; the arc-shaped convexity is embedded in the fixing groove, and the arc-shaped convexity is convex in the fixing groove The interior is fixed and fixed by adhesive; a cylindrical mounting shaft is fixed and welded at the center of the bottom surface of the chassis.
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