Protection method of bolt for bridge and anti-corrosion bolt component

The invention provides a protection method of a bolt for a bridge. The protection method comprises the following steps that firstly, a bolt connecting piece is fixedly connected to a base material needing to be fixed; the exposed outer surface of the bolt connecting piece is sequentially coated with primer, intermediate paint and finish paint; and finally, a sealant is filled in a protective cover, and the protective cover is buckled on the bolt connecting piece. According to the method, the exposed outer surface of the bolt connecting piece is sequentially coated with the primer, the intermediate paint and the finish paint, and then the protective cover is buckled on the bolt connecting piece, so that the effects of simple construction, good durability and good corrosion resistance are achieved. The invention further discloses an anti-corrosion bolt component. The anti-corrosion bolt component comprises the bolt connecting piece, a paint coating layer, a sealant layer and the protective cover, wherein the ex