Device and method for calibrating gun sight

The invention discloses a device and a method for calibrating a pistol sight, which can realize theoretical calibration when a pistol does not shoot and personalized calibration when live ammunition shooting is combined. Comprising an adjusting base, a limiting block and a movable block, a concave cavity part of the adjusting base is used for being matched with two side walls of the bolt for limiting, a boss is arranged on the outer surface of one side wall of the adjusting base, a round hole and a threaded hole are formed in the boss, a top head is in sliding fit in the round hole, and an adjusting rod is matched in the threaded hole and used for ejecting the top head. The ejector head is used for ejecting and adjusting the transverse position of the sight on the bolt; a cylindrical positioning rod is arranged at the front end of the limiting block and used for being inserted into a striking pin hole in the rear end of the bolt for limiting, the limiting block is provided with two side walls and used for bei