Provided is a wrapper cutter, including a shell having an axially penetrating hollow structure. A notch extending along an axial direction is further formed in one side edge of the shell, and a cutting knife is fixedly arranged on an inner bottom wall of the notch. Supporting planes arranged axially are further arranged on a sidewall of the shell, can serve as contact planes between the wrapper cutter and a placing plane, and are used to perform positioning, force bearing and supporting in the case of wrapper cutting and assist the wrapper cutter to slide linearly.