The invention discloses a paper shredder protection device capable of preventing residue on the outer wall of a paper shredding wheel in the technical field of paper shredders, and the paper shredder protection device comprises a paper shredder main body, the left and right sides of the top of the inner cavity of the paper shredder main body are symmetrically provided with residue-preventing paper shredding wheel protection mechanisms with the same structure; the anti-residue paper shredding wheel protection mechanism comprises paper shredding wheel pieces which are symmetrically and movably arranged on the left side and the right side of the top of an inner cavity of the paper shredder body, one end of each paper shredding wheel piece is connected with a clearing mechanism, and one end of each clearing mechanism is connected with a blowing piece. The anti-residue paper shredding wheel protection mechanism is arranged, when a paper shredding tooth piece moves to the outer wall of the driven roller from a transition arc-shaped convex part, under the action of a connecting spring, a tooth blade inwards enters a movable opening in the paper shredding roller, on one hand, paper shreds remaining on the tooth blade are pushed away from the tooth blade when the tooth blade moves, and on the other hand, the paper shredder is matched with a removing mechanism, so that the paper shredder is convenient to clean. And as the tooth blades at the positions are retracted inwards, the cleaning quality is higher, and the electrostatic eliminating bristles are prevented from being damaged due to the influence of the tooth blades.