A paper sheet feeding apparatus, comprising: a first feeding tray configured to support and feed a batch of sheets, said first feeding tray movable in a vertical direction; a second feeding tray configured to support and feed a batch of sheets, said second feeding tray movable in a vertical direction; a pickup unit configured to pick up sheets, arranged above the first feeding tray or the second feeding tray in charge of feeding; an air blow unit configured to blow air towards an upper part of the batch of sheets on the first feeding tray or the second feeding tray in charge of feeding from a side of the upper part of the batch of sheets; and a controller configured to control the vertical movement of the first feeding tray or the second feeding tray in charge of feeding; wherein the first feeding tray is movable in a direction perpendicular to the vertical direction, characterized in that the paper sheet feeding apparatus further comprises a status sensor configured to detect a sparseness value of the upper part of the batch of sheets loosened by the air blow unit, the controller is configured to control the vertical movement of the first feeding tray or the second feeding tray in charge of feeding so that the sparseness value of the upper part of the batch of sheets stays within an upper limit sparseness value and a lower limit sparseness value that is suitable for picking up a sheet from the batch of sheets, and the first feeding tray is movable in a direction perpendicular to the vertical direction after making the first feeding tray ascend until the status sensor detects the upper limit sparseness value, such that the batch of sheets on the first feeding tray falls on top of the batch of sheets on the second feeding tray. a first feeding tray configured to support and feed a batch of sheets, said first feeding tray movable in a vertical direction; a second feeding tray configured to support and feed a batch of sheets, said second feeding tray movable in a vertical direction; a pickup unit configured to pick up sheets, arranged above the first feeding tray or the second feeding tray in charge of feeding; an air blow unit configured to blow air towards an upper part of the batch of sheets on the first feeding tray or the second feeding tray in charge of feeding from a side of the upper part of the batch of sheets; and a controller configured to control the vertical movement of the first feeding tray or the second feeding tray in charge of feeding; wherein the first feeding tray is movable in a direction perpendicular to the vertical direction, characterized in that the paper sheet feeding apparatus further comprises a status sensor configured to detect a sparseness value of the upper part of the batch of sheets loosened by the air blow unit, the controller is configured to control the vertical movement of the first feeding tray or the second feeding tray in charge of feeding so that the sparseness value of the upper part of the batch of sheets stays within an upper limit sparseness value and a lower limit sparseness value that is suitable for picking up a sheet from the batch of sheets, and the first feeding tray is movable in a direction perpendicular to the vertical direction after making the first feeding tray ascend until the status sensor detects the upper limit sparseness value, such that the batch of sheets on the first feeding tray falls on top of the batch of sheets on the second feeding tray.