Weigh screw feeder can ensure the accuracy of equipment’s calculation ,so as to meet the actual feeding requirements.Meanwhile, the weigh screw feeder can avoid any falling materials from the belt conveyors. In order to make it easy for observe, there design some reasonable inspection window, inside there is a light which is flameproof. In this way ,we can observce the materials’ movement of weigh screw feeder. In addition ,there set up the non slip funtion on the drive rollers. The driven rollers are with self cleaning function . Belt tension is easy to adjust and make the conveying belt be fixed,so as to ensure the calculation accuracy.