The utility model provides a riding wheel dismounting device of transmission band turn ware, bears the mechanism and includes base, bracing piece, locating lever including bearing mechanism, ejectionmechanism, and bracing piece, locating lever are all installed on the base, and the bracing piece is two at least and just distributes at the locating lever periphery, and the locating lever is higherthan the bracing piece and locating lever upper portion is provided with the screw thread, and the last through -hole structure that supplies the locating lever to pass that is provided with of ejection mechanism also is provided with the screw thread in the through -hole structure, the riding wheel includes outer ring, interior ring, and the suit is on the locating lever in proper order at excircle intra -annular, ejection mechanism, riding wheel from the top down for interior ring suit, and the bracing piece is being replaced to the lower terminal surface of outer ring, the up end of ring in ejection mechanism is replacing the lower part. The utility model discloses, ring downstream and outer ring separate in the mode oppression of adoption screw precession, and interior ring atress isrelaxed, dismantle swift, high efficiency, laborsaving, and just the interior ring after the dismantlement does not receive the damage, can reuse.