Multi-caliber grinding device for alloy copper sleeve

The utility model provides a multi-caliber polishing device for an alloy copper sleeve, which comprises an equipment main body, one side of the equipment main body is fixedly provided with a motor, and the equipment main body is connected with a first polishing column in a sliding manner. An alloy copper sleeve needing to be polished is arranged on a second polishing column in a sleeving mode, the alloy copper sleeve is pressed to move towards a cross plate, the cross plate moves to drive a pressing column to move towards a blocking plate, the blocking plate enters a sliding groove under stress of the pressing column, and the blocking plate is not located in the middle of a first polishing column any more; the first grinding columns contract towards the second grinding columns under the elastic force of the second springs, the grinding pieces contracting to the first grinding columns make contact with the outer surfaces of the alloy copper bushes, the two first grinding columns automatically contract so that