Abrasive disc, which includes a stone cutting discs , a baffle plate and a abrasive film; wherein the top disc includes several riveting element, a positioning plate, a top plate, a bolt and a nut about positioning plate; the utility model modified by means of a bolt structure, the bolt itself by first engaging portion and the top of the central aperture for engaging the accuracy level, and then the bottom by a bolt with a polygonal fixing portion opposite lower positioning plate fixing polygonal hole engaging for vertical accuracy, thereby providing a fixed good and stable rotation of the abrasive disc excellent; an additional section with the bolt threads, engaging portion and an outer diameter of the fixed portion of different design, so that the bolt is not easy loose, with internal components and the user is not easy to wear because of instability caused by the rotation of the tile cutting disc hand tingling advantages.