This invention relates to the field of sorting devices, and more particularly to an oat flake air-separation device and its process. The device comprises: a frame; a feeding device mounted on the frame for receiving and spreading oat flakes; a guide trough connected to the outlet of the feeding device for slow conveying of the oat flakes; a sorting section located below the guide trough, with a built-in camera for visually identifying impurities; and a separating trough located below the sorting section, including a waste trough. The feeding device includes a
discharge device comprising a trough and a base, a feeding plate, and multiple second guide plates arranged in a stepped, staggered pattern along the material conveying direction to ensure a smooth transition and gradual
thinning of the oat flakes. A through-slot is formed in the center of each second guide plate, and the
nozzle of the pusher is precisely located within this through-slot, with the
nozzle position accurately aligned with the through-slot to ensure that the
airflow fully acts on the oat flakes.