Grinding method for valve seat of safety valve

A grinding method for a safety valve seat comprises the steps that (1) the safety valve seat to be ground is supported on an eccentric positioning disc, radial positioning is formed through cooperation of a through hole in the bottom and a circular-truncated-cone-shaped structure, and the sealing face of the safety valve seat to be ground faces upwards; (2) one end of a pressing block is in threaded fit with a threaded hole in the rotating disc through a screw to form fixation, the other end of the pressing block is pressed on a connecting flange for installing a valve seat, and the position of the safety valve seat is fixed; (3) the grinding head is pressed on the sealing surface of the safety valve seat under the action of self weight; and (4) the rotating disc rotates to drive the safety valve seat to move eccentrically, and the movement track of the safety valve seat is located in the projection range of the grinding head till grinding is completed. The method is easy and safe to operate, the service life