The invention relates to a servo electric tire gripper for a tire vulcanizing machine. An arm of the tire gripper is connected with a fixing ring, a servo driving device is mounted below the arm, anda rotating ring rotating around the axis of the fixing ring is mounted on the fixing ring; the lower surface of the fixing ring is provided with a group of tire grabbing claws evenly distributed alongthe circumferential direction of the fixing ring, each tire grabbing claw comprises a claw sheet, a sliding plate and a connecting rod, the claw sheets are mounted at the inner ends of the sliding plates, the sliding plates slide along a sliding base fixed on the fixing ring through a straight line guide rail, one ends of the connecting rods are hinged to the sliding plates through hinge pins I,and the other ends of the connecting rods are hinged to the rotating ring through hinge pins II; and the servo driving device is connected with one of the tire grabbing claw through a connecting base,and the remaining tire grabbing claws are driven to synchronously drive through rotation of the rotating ring so as to form a structure of synchronous radial opening or closing of all the tire grabbing claws. The function of achieving automatic adjustment of the tire grabbing range is achieved.