The utility model discloses a mill capable of improving the circularity and a cutting effect. The mill comprises a mill rack, wherein a feeding mechanism is arranged at the upper end of the mill rack; a platform with an inclined upper end surface is correspondingly arranged on the lower part of the feeding mechanism; a mounting hole for mounting a rotating shaft of a motor is formed in the middle of the platform; the motor is arranged below the platform; the motor is in transmission connection with the rotating shaft of the motor; the rotating shaft of the motor penetrates through the mounting hole; a rotating plate is arranged on the rotating shaft of the motor on the platform; a polishing mechanism capable of improving the circularity and the cutting effect is arranged on the rotating plate; a controller is arranged at the lower part of the mill rack, and is connected with the motor; and a discharge opening is formed in the combined part of the platform and the mill rack. The mill disclosed by the utility model is reasonable in structure and convenient to install; the production efficiency and the production effect can be effectively ensured; the circularity and the cutting effect can be improved; and the polishing effect is ensured.