Double open paper cutter

The utility model discloses a double-opening mediated paper knife, comprising a tool body and tool pieces arranged in the tool body; a pair of movable arms are arranged at two sides of the tool body symmetrically, one end of the movable arms is fixed on the tool body, and the other free end thereof is provided with a round cutting blade; the two sides of the movable tool body are provided with cavities which are provided with holding movable arms. The double-opening mediated paper knife has the advantages that: a folding structure of the movable arm is adopted, the using is convenient and safe and the volume is reduced; a double-cutting-blade structure prevents that the knife can continue doing work when one of the cutting blade is damaged.