This program consists of three parts: the falling sand recovery system, the old sand regeneration system and the sand mixing system. The falling sand recovery system comprises a vibration falling machine, a conveyor, a chain hoist, a sand storage and a dust removal system; the old sand regeneration system comprises a vibration crusher, a vibrating screening machine, a vortex scrub recovery machine, etc.; The system includes a double-arm sand mixer and a liquid material adding device; each part can work independently and is equipped with its own dust removal system. The start and stop of the dust collector are synchronized with the work of each part to ensure the dust removal effect. Save power consumption.