Spiral sand washer is a kind of efficient sand and gravel washing machine, which is widely used for sand and stone washing, grading and impurities removing. Spiral sand washers also called sand screw washers, are specifically used to produce quality sand for construction, highways, railways, glass making, water and electricity industries and more. Spiral sand washing machine can be divided into single screw and double screw washing machine, and with the features of high cleanliness, good sealing structure, power consumption, fully closed transmission device, adjustable weir plate, durability, good dehydration effect, stability of finished product and more.