Cutter blunting machine

The invention relates to a cutter blunting machine, which comprise a rack, a grinding material tank, a grinding material, a drive motor, an output frame and rotating shafts, wherein the grinding material tank is capable of vertically moving along the height direction of the rack for adjustment; the grinding material is contained in the grinding material tank; the drive motor is arranged on the rack and an output shaft of the drive motor is vertically downward; the output frame is fixed to the lower end of the output shaft; the rotating shafts are arranged in parallel with the output shaft and rotatably arranged on the output frame around the respective axes; a to-be-blunted cutter is detachably mounted on the lower end parts of the rotating shafts; and when the cutter blunting machine works, the lower end parts of the rotating shafts and the to-be-blunted cutter stretch into the grinding material tank; the drive motor drives the rotating shafts to rotate and revolve on own axes, so that the cutter is blunted by the grinding material. According to the cutter blunting machine, the rotating shafts rotate around the output shaft of the drive motor and revolve on own axes, and the cutter is driven to rotate inside the grinding material tank provided with the grinding material, so that the cutter is blunted. The cutter blunting machine has the advantages that the structure is simple; the implementation is convenient; and the cost is low.