The utility model discloses a tube processor driving device of a top drive system. The tube processor driving device comprises a hydraulic motor and a worm and gear transmission structure, wherein a worm gear is fixedly arranged on the upper portion of a rotary head, and output shaft of the hydraulic motor is connected with a worm to transmit power to the worm gear, and therefore the rotary head is driven to move. The tube processor driving device is high in reliability, and the rotary head can be positioned at any angle. On the premise that normal functions are achieved, the whole structure is simplified.