This series screw washing machine is mainly used for washing material after crushing. Small particles suspend in water flow out through outlet. Coarse particles sink down to bottom of groove and they will be pushed to the discharging end by the screw. This stone washing machine also can be used for desliming, dewatering and washing ore. This machine bears the features of simple structure, convenient maintenance, long-term continuous running, good adaptability and high capacity, etc. So it can meet the needs of modern large-scale industry production.