A device for correcting an aluminum alloy wheel, being composed of a frame, a feed sliding plate, a correction cutter head, a bearing, a correction motor, a coupling, a shaft, positioning rods, positioning sliding blocks, a positioning guide rail, a positioning support plate, and positioning cylinders, wherein the device for correcting an aluminum alloy wheel comprises a hub positioning unit, in which the positioning support plate is mounted on the frame, the positioning guide rail is mounted on the positioning support plate, the positioning sliding blocks are connected to the positioning guide rail, and the positioning rods are fixed on the positioning sliding blocks, and the correction motor is configured to control the rotation of the correction cutter head, characterized in that the device for correcting an aluminum alloy wheel comprises a tool correction unit, in which stepped cutting edges having different outer diameters are annularly distributed in the correction cutter head, a feed lower support plate, an expansion cylinder, an axial positioning plate, an expansion sleeve, an expansion core, a feed guide rail, a reinforcing rib, a ball nut, a lead screw, a feed side support plate and a feed motor; within the hub positioning unit, four positioning cylinders are respectively connected with four positioning sliding blocks to drive the four sliding blocks to move synchronously so as to control synchronous centering of four positioning rods and complete initial positioning of a hub; the device further comprises a hub feed unit, in which the feed side support plate and the feed motor are mounted on the feed lower support plate, the feed side support plate is connected with the frame through the reinforcing rib to play a role in stabilizing, the axial positioning plate is configured to position the hub in the axial direction, the expansion cylinder can drive the expansion core to complete radial positioning of the hub, the hub can be fixed while being expanded, and the feed motor is configured to drive the feed sliding plate to move up and down through the ball screw structure (20, 21) so as to drive the fixed hub to achieve up-down feed movement; and within the tool correction unit, a standard outer diameter cutting edge is composed of three parts, the lower cutting edge being vertical, the upper cutting edge being at an angle of 30 degrees to the horizontal line, and the middle connection part being an R2.5 arc cutting edge. the device for correcting an aluminum alloy wheel comprises a hub positioning unit, in which the positioning support plate is mounted on the frame, the positioning guide rail is mounted on the positioning support plate, the positioning sliding blocks are connected to the positioning guide rail, and the positioning rods are fixed on the positioning sliding blocks, and the correction motor is configured to control the rotation of the correction cutter head, characterized in that the device for correcting an aluminum alloy wheel comprises a tool correction unit, in which stepped cutting edges having different outer diameters are annularly distributed in the correction cutter head, a feed lower support plate, an expansion cylinder, an axial positioning plate, an expansion sleeve, an expansion core, a feed guide rail, a reinforcing rib, a ball nut, a lead screw, a feed side support plate and a feed motor; within the hub positioning unit, four positioning cylinders are respectively connected with four positioning sliding blocks to drive the four sliding blocks to move synchronously so as to control synchronous centering of four positioning rods and complete initial positioning of a hub; the device further comprises a hub feed unit, in which the feed side support plate and the feed motor are mounted on the feed lower support plate, the feed side support plate is connected with the frame through the reinforcing rib to play a role in stabilizing, the axial positioning plate is configured to position the hub in the axial direction, the expansion cylinder can drive the expansion core to complete radial positioning of the hub, the hub can be fixed while being expanded, and the feed motor is configured to drive the feed sliding plate to move up and down through the ball screw structure (20, 21) so as to drive the fixed hub to achieve up-down feed movement; and within the tool correction unit, a standard outer diameter cutting edge is composed of three parts, the lower cutting edge being vertical, the upper cutting edge being at an angle of 30 degrees to the horizontal line, and the middle connection part being an R2.5 arc cutting edge.