The utility model provides a grading ring adjuster, and belongs to the technical field of repair tools. The grading ring adjuster comprises a fixing piece, a plurality of clamping grooves and an operating rod, and the clamping grooves are all fixed to the fixing piece and used for being connected with a grading ring in a clamped mode. And the fixing piece is movably connected with the operating rod, and the operating rod is used for driving the fixing piece and the grading ring clamped with the clamping groove to move. The technical problems that in the prior art, time and labor are wasted, and danger is high are solved.