The utility model discloses a be applied to centering spring guide pin bushing of screw fitting rifle, include: the outer tube, can dismantle the connecting piece, be used for with the rear end detachably of outer tube is connected to the screw fitting rifle, feed the uide bushing, by the front end of outer tube extends, centering the copper sheathing, the axial inlay adorn in feed in the uide bushing, wherein, can dismantle the connecting piece embedded be equipped with with feed the step shaft that the uide bushing was axially aligned, and, the step shaft has axially extending bore, the outer tube embeds there is both ends butt respectively feed the uide bushing with the elastic element of step shaft, feed the uide bushing can for outer tube axial displacement. Among the above -mentioned technical scheme, the rifle epicranium of screw fitting rifle is felt relieved, can not appear the condition of rifle head horizontal hunting in the course of the work, leads to the screw simultaneously, has improved the work efficiency of screw fitting rifle, has guaranteed product quality.