Novel packaging cutter

The utility model belongs to the technical field of adhesive tape cutting devices, and relates to a novel packaging cutter which comprises a connecting plate, an arc-shaped top plate, a ratchet wheeland a cutting head, and is characterized in that a rotating shaft is rotationally mounted on the right side of the connecting plate, spring seats are symmetrically arranged on the rotating shaft, cavities are formed in the spring seats, and the bottom ends in the cavities are elastically connected with the arc-shaped top plate through springs; a ratchet wheel is fixedly arranged at the position, between the connecting plate and the spring seat, of the rotating shaft, a fixing column is fixedly arranged on the inner wall, located on the upper right portion of the ratchet wheel, of the connecting plate, a pawl is rotationally connected to the fixing column, and a torsional spring is arranged between the fixing column and the pawl. According to the adhesive tape fixing device, adhesive tape rolls of different sizes c