Tumbler screen machine is the traditional screening equipment. After the crushed stone material enters into the drum, it relies on the centrifugal force of drum rotation and jigging effect to screen the material. It is screened out one by one through different mesh screens. Different specifications of stone material screened out through the funnel falls into the belt machine sent to the finished material yard. Its structure is simple and reliable, smooth operation, with good sealing, no pollution, low noise, quick change of mesh, fine grading, large proportion of sorting, high output, fast sorting, low failure rate, easy maintenance, etc., especially suitable for grading grading sand and gravel quarry use. Sand sifter, also known as dry land sand sifter boat, is suitable for river, reservoir, deep coal yard sand and gravel away from the equipment. It is composed of hull, frame, reducer, conveyor belt, rotary screen, engine or motor. The structure of this model is simple, economical and easy to operate. It is divided into drum sand sifter, washing drum sand sifter, vibrating screen sand sifter and so on. It is widely used in construction sites, sand and gravel plants, sand quarries, mixing stations, coal yards, grain screening and so on.