The invention discloses a burr shearing device for paper printing. The device comprises a bottom plate, wherein two first limiting rods are fixedly connected to the position, close to the front side, of the top of the bottom plate, two first limiting rods are fixedly connected to the position, close to the rear side, of the top of the bottom plate, the four first limiting rods are arranged in
bilateral symmetry, first moving plates are arranged at the positions, close to the front side and the rear side, of the top of the bottom plate respectively, and first sliding grooves are formed in the positions, close to the front sides and the rear sides, of the bottoms of the two first moving plates respectively. Through mutual cooperation of a second rotary knob, a second transmission rod, a second limiting rod, second movable blocks, a first transverse plate, third connecting rods, first vertical plates, blades and other mechanisms, paper of different sizes can be
cut by adjusting the range correspondingly; and through mutual cooperation of the bottom plate, the first limiting rods, first movable blocks, a first connecting rod, a first transmission rod, second connecting rods, a first circular plate, vertical rods, L-shaped rods, rollers and other mechanisms, the paper can be flexibly clamped, and meanwhile the paper is fixed more firmly and is not prone to deviation.