High-precision clamp for processing rotor

A high-precision clamp for processing a rotor comprises a cylinder, a clamp holder and an expansion sleeve, wherein the clamp holder is connected with the cylinder body through a connection block; a support rod is arranged at the front end of the clamp holder in a forward extension mode; a through hole is formed on the axial centers of the clamp holder and the support rod; the outer wall of the support rod is conical; the expansion sleeve is sleeved on the outer wall of the support rod; a piston rod of the cylinder passes through the through hole and the front end wall of the expansion sleeve; and two nuts are arranged at the front end of the piston rod to sandwich the front end wall of the expansion sleeve. A rotor to be processed is sleeved on the support rod and the expansion sleeve. When retracted, the piston rod of the cylinder drives the expansion sleeve to move towards the support rod so that the expansion sleeve can be expanded by the conical surface of the support rod to expand the rotor tightly, the