The utility model provides a granularity sand recovery unit, including the host computer body, the top support frame that L shape is passed through at host computer body top is connected with top rotation motor, top rotation motor bottom is inhaled the material mouth through the main tributary vaulting pole of vertical setting with the calathiform and is connected, material gonys portion outside is inhaled along evenly being provided with four semicircular opening to the calathiform, the calathiform is provided with ring rail on inhaling the lateral wall of material mouth, the last edge that is equipped with of ring rail the gliding slider of ring rail, the slider is established with the cover the outside sealed cloth of ring rail is connected, connect on the slider and stretched into theinside flexible rubber hose of material mouth is inhaled to the calathiform, flexible rubber hose's the other end and setting are in the internal portion of host computer is to inhaling air pump connected, aspirator pump and material stock cavity intercommunication, the one end of material stock cavity is equipped with strains the gas board, it is equipped with the bottom and opens the door to strain gas board bottom.