Four-stage grinding device for food waste processor

The utility model relates to a four-stage grinding device for a food waste processor. The four-stage grinding device comprises a grinding disc arranged on a rotor shaft, a grinding ring and a smashing cutter disc. The four-stage grinding device is characterized in that the grinding disc is mounted on the rotor shaft, a knife rest and crushing knives are arranged on the upper surface of the grinding disc, a cutting head is arranged at the upper part of the knife rest, and a first grinding interval (L) is formed between the cutting head and a sharp claw; a second grinding interval (L1) is formed between the grinding ring and the grinding disc; a strip-shaped steel plate is adhered to the lower surface of the grinding disc, two grinding knives are respectively arranged at two ends of the strip-shaped steel plate, and a third grinding interval (L2) is formed between the strip-shaped steel plate and the grinding ring; the smashing cutter disc is butted below the strip-shaped steel plate and is in a crossed round d