Centerless grinding machine capable of being disassembled quickly

The utility model discloses a centerless grinding machine capable of being disassembled quickly, which comprises a centerless grinding machine body, a rotating shaft driven by power is arranged on the centerless grinding machine body, and a grinding wheel is detachably arranged on the rotating shaft through a broadening structure. The expanding structure comprises a plurality of groups of sliding rods which are annularly arranged on the rotating shaft at equal intervals by taking the rotating shaft as the circle center, the sliding rods are controlled to slide on the rotating shaft through an adjusting structure, and connecting blocks are fixedly mounted at the ends, away from the rotating shaft, of the sliding rods; during connection, the connecting block is clamped in the connecting groove in a matched mode, when the rotating shaft rotates, the grinding wheel rotates to work under the action of the sliding rod, the connecting block and the connecting groove, when the sliding rod drives the connecting block