The invention discloses an adhesive tape cutting device, relates to the technical field of adhesive tape cutting, and aims to solve the problem of inconvenience in adhesive tape cutting. According to the adhesive tape cutting device, after an end cover is opened, a supporting ring of an adhesive tape is clamped on a clamping rack to realize relative fixation of the adhesive tape in a cavity of a base; the cavity of the base is divided into two independent parts by arranging a partition plate so as to conveniently place adhesive tapes of different widths in the cavity of the base; the outer wall of the base is provided with a tool rest; the tool rest is provided with first blades for realizing cutting of adhesive tape cloth; the base is provided with two notches; the two notches penetrate through the end face of the base; second blades for performing cutting operation on the adhesive tape are arranged in the notches. The adhesive tape cutting device is convenient to operate and easy to use, the adhesive tape cloth can be conveniently and quickly cut, and the storage of the adhesive tape is facilitated.