Lossless polishing machine

The utility model provides a lossless polishing machine. The lossless polishing machine comprises a feeding hopper, a material processing device and a discharging hopper, the feeding hopper is installed at the top end of the material processing device, and the discharging hopper is installed at the bottom end of the material processing device. The circulating system comprises a bran outlet, a fan, a cyclone separator and an air seal machine; the bran outlet is formed in the bottom end of the material processing device, and the lower end of the bran outlet is connected with a fan; one end of the cyclone separator is connected with the fan, the other end of the cyclone separator is connected with the air seal machine, and the cyclone separator is connected with the material processing device. Waste air is supplemented to the polishing device through the rear portion of the cyclone polishing device, the whole dust removal system is recycled, and environment pollution is prevented. The full-automatic polishing ma