Belt drive transmission, without oil lubrication. Adjustable vibrating amplitude, low noise. Driving method uses self-balance vibration type, good sieving effect, small size, smooth operation. Streamlined design inside, there is no material deposition, no cross contamination. The streamline design within the outlet, without deposition, avoid cross contamination. The screen could either be suspended on the prefabricated building, or be placed on the ground. Pressure screening is simple, convenient and can be replaced rapidly.