Multifunctional grinding wheel

The utility model relates to the technical field of grinding and polishing, and discloses a multifunctional grinding wheel which comprises a grinding wheel body, a fixing column is arranged on the inner surface of the grinding wheel body in a sleeved mode, a circular ring is fixedly connected to the right surface of the fixing column, a rapid dismounting and mounting device is arranged in the fixing column and comprises a threaded rod, and the threaded rod is rotationally arranged on the inner surface of the circular ring in a sleeved mode. The right end of the threaded rod is fixedly connected with a switch, the outer surface of the threaded rod is sleeved with a sliding block in a threaded mode, the outer surface of the sliding block is fixedly connected with a fixing block, the upper surface of the fixing block is rotationally connected with a supporting rod, the upper end of the supporting rod is rotationally connected with a second supporting rod, and the outer surface of the second supporting rod is rot