The utility model discloses a device used for cutting an old leather belt and aims to provide a device which can replace the manual labor for cutting the old leather belt. The utility model adopts the technical proposal that the device is provided with a frame body (1) which is further provided with an electric motor (2), a decelerator (3), a support roller (10) and an electric cabinet (12); the electric motor (2) is connected with the guide screw of a screw pair (5), and a screw nut is provided with a transverse cutter (4) and is connected with a steering bar (13); a plurality of longitudinal cutters (6) form a longitudinal knife row; the decelerator (3) is connected with a driving roller (9), and the frame body (1) is also provided with an operating button (7), a cramping apparatus (8) and a baffle (11). The device is mainly used for processing and fabricating the old leather belt into a pipe hanging hook of a wind pipeline, a water pipeline or a slurry pipeline used in the coal mine.