A device for high-accuracy wall reduction and uniformation includes: three rollers, three guide plates, and a plug. The three rollers are circumferentially evenly distributed along a rolling line which is a straight line of the moving direction of a billet being rolled. The three rollers are of unequal diameter rotating structure and each roller has a small end and a big end; three small ends of the three rollers are located at a first end of the device, and three big ends of the three rollers are located at a second end; and the three rollers are rotatable around their own axis. Each guide plate is disposed between every two adjacent rollers. The three guide plates rotatably abut against the three rollers, and are circumferentially evenly distributed along the rolling line. The plug is disposed in a forming space formed by the three rollers and three guide plates.

A device for high-accuracy wall reduction and uniformation includes: three rollers, three guide plates, and a plug. The three rollers are circumferentially evenly distributed along a rolling line which is a straight line of the moving direction of a billet being rolled. The three rollers are of unequal diameter rotating structure and each roller has a small end and a big end; three small ends of the three rollers are located at a first end of the device, and three big ends of the three rollers are located at a second end; and the three rollers are rotatable around their own axis. Each guide plate is disposed between every two adjacent rollers. The three guide plates rotatably abut against the three rollers, and are circumferentially evenly distributed along the rolling line. The plug is disposed in a forming space formed by the three rollers and three guide plates.