Grain storing and discharging device

The utility model discloses a grain storing and discharging device, which belongs to the technical field of pet feeding, and comprises a feed cylinder, a sealing mechanism, a grain discharging mechanism and a vacuumizing assembly, the feed cylinder comprises a first shell and a second shell, the first shell is detachably matched with the second shell, a through hole is arranged between the first shell and the second shell, the first shell is provided with a grain storing chamber, and the second shell is provided with a vacuum pumping assembly. The second shell is provided with a grain outlet chamber and a grain outlet, and the grain outlet, the grain outlet chamber, the through opening and the grain storage chamber are sequentially communicated; the vacuumizing assembly is mounted outside the feed cylinder and is communicated with the grain storage chamber or the grain outlet chamber; the sealing mechanism is mounted outside the feed cylinder and is used for opening or closing the grain outlet; the grain disc