The invention belongs to the technical field of rice mill equipment, discloses a hand wheel of a gear regulator and aims to solve the problem of unsmooth and stuck pulling caused by the fact that a pressure-relief pull rod mounted on an existing hand wheel is not at the center of the hand wheel. The hand wheel comprises a hand wheel body, the end face of one side of the hand wheel body is providedwith a circular groove, a plurality of semispherical grooves for mounting of steel balls are annularly distributed around the circular groove, the center of the circular groove is provided with a pressure-relief hole for mounting of a pressure-relief rod, and two mounting holes are distributed beside the pressure-relief hole. Circle centers of the two mounting holes and the circle center of the pressure-relief hole are collinear, and the two mounting holes are symmetrically arranged relative to the pressure-relief hole. By design of the pressure-relief hole for mounting of the pressure-reliefpull rod in the center of the hand wheel body, mounting of the pressure-relief pull rod in the center of the hand wheel body is guaranteed, and the problem of unsmooth and stuck pulling caused by thefact that the pressure-relief pull rod is not at the center of the hand wheel is effectively solved. The hand wheel is applicable to the gear regulator.