Sand washing machine is a kind of necessary and water-washing-style equipment in sand production system. Sand washing machine can wash away the small amount of mixed powder sand and impurities from the sand, so that can improve the quality of sand. It has features of high clearance ratio, seasonable structure, large productivity, low power consumption, less loss of sand in washing process. This machine is mainly used for washing, grading and dehydration quartz sand in construction sites, gravel plants, concrete hydropower dam, glass plant.