Grain preservation system

The utility model discloses a grain fresh-keeping system which comprises a hot air generator, a drying chamber and an occupying piece, a feeding port and a discharging port are formed in the center of the top and the center of the bottom of the drying chamber respectively, and when grains are fed into the drying chamber through the feeding port, a pile tip is formed in the center of the top of the grain; when grain is discharged out of the drying chamber through the discharging port, a pit is formed in the center of the top of the grain, the hot air generator is used for drying the grain, and the occupying piece is movably or expansively arranged at the bottom of the drying chamber. When grain is put into the drying chamber through the feeding port, the occupying part reduces the thickness of the center of the grain, after grain putting is completed, the occupying part moves upwards to the position above the grain, or when the occupying part reduces the size of the occupying part, the center of the grain coll