The utility model discloses a rotor bonds with polarity magnet steel and fixes a position frock, include position sleeve and a plurality of elastic component that evenly arrange along the position sleeve circumferencial direction, elastic component comprises screw, fastening block and spring, the fastening block is located the position sleeve inboard to link to each other with the screw tip, spring suit is on the screw to be located between fastening block and the position sleeve, the position sleeve center still is provided with the location boss, the screw comprises screw rod and screwhead, and the screw rod is continuous through cubic boss with the screwhead, be provided with the screw patchhole that is used for mounting screws on the position sleeve to screw patchhole top be provided with with cubic boss assorted four directions recess. The utility model discloses the magnet steel of can quick, reliable bonding adjacent row scolding, obvious improvement assembly speed and assembly precision. The device simple structure, easily manufacturing, operation swiftly can extensively be popularized and applied at rotor magnet steel bonding technical field.