Supporting hole shielding device of heating plate for sand blasting treatment

The utility model discloses a supporting hole shielding device of a heating plate for sand blasting treatment, which comprises the heating plate, a plurality of supporting holes penetrating through the upper surface and the lower surface of the heating plate are respectively arranged on the heating plate, a shielding piece is arranged in each supporting hole, the shielding piece comprises a metal rod, and the upper end of the metal rod is provided with a metal cap which is integrally connected with the metal rod. An external thread section is arranged at the lower end of the metal rod, the metal rod penetrates through the supporting hole from top to bottom and extends out, the metal cap shields the supporting hole, a gasket is arranged between the metal cap and the upper surface of the heating plate, and a nut is screwed at the lower end of the metal rod to lock the metal rod. According to the utility model, each supporting hole and the edge position of the supporting hole can be protected, so that the inner