An automatic pet feeding device comprising: a grain storage bin comprising a grain leaking member formed at a lower end thereof; a pushing granary arranged below the grain storage bin and comprising a grain delivery member, the pushing granary in communication with the grain leaking member; a grain pusher slidably arranged between the grain storage bin and the pushing granary; and wherein the grain pusher is configured to push pet food in the pushing granary out of the grain delivery member, and open or close the grain leaking member and the grain delivery member; and wherein, the feeding device further comprises: a grain baffle arranged close to the grain delivery member and configured to open and close the grain delivery member; the feeding device further configured such that when the pushing granary is in communication with the grain leaking member, the grain delivery member is closed by the grain baffle, and when the pushing granary is not connected with the grain leaking member, the grain delivery member is opened by the grain baffle; characterized in that the grain baffle comprises a baffling portion, a rotating portion and a pushing rod, the rotating portion arranged at an end of the baffling portion, and the pushing rod connected to the rotating portion; the rotating portion rotationally arranged at a bottom portion of the pushing granary; the grain pusher comprising a pushing bar corresponding to the pushing rod; and wherein the pushing bar comprises a first pushing portion and a second pushing portion connected with the first pushing portion, the second pushing portion arranged close to the grain delivery member, and a thickness of the second pushing portion that is towards the pushing rod greater than a thickness of the first pushing portion that is towards the pushing rod; the pushing rod comprising an arc portion arranged close to the grain delivery member, and a flat portion connected with the arc portion. a grain storage bin comprising a grain leaking member formed at a lower end thereof; a pushing granary arranged below the grain storage bin and comprising a grain delivery member, the pushing granary in communication with the grain leaking member; a grain pusher slidably arranged between the grain storage bin and the pushing granary; and wherein the grain pusher is configured to push pet food in the pushing granary out of the grain delivery member, and open or close the grain leaking member and the grain delivery member; and wherein, the feeding device further comprises: a grain baffle arranged close to the grain delivery member and configured to open and close the grain delivery member; the feeding device further configured such that when the pushing granary is in communication with the grain leaking member, the grain delivery member is closed by the grain baffle, and when the pushing granary is not connected with the grain leaking member, the grain delivery member is opened by the grain baffle; characterized in that the grain baffle comprises a baffling portion, a rotating portion and a pushing rod, the rotating portion arranged at an end of the baffling portion, and the pushing rod connected to the rotating portion; the rotating portion rotationally arranged at a bottom portion of the pushing granary; the grain pusher comprising a pushing bar corresponding to the pushing rod; and wherein the pushing bar comprises a first pushing portion and a second pushing portion connected with the first pushing portion, the second pushing portion arranged close to the grain delivery member, and a thickness of the second pushing portion that is towards the pushing rod greater than a thickness of the first pushing portion that is towards the pushing rod; the pushing rod comprising an arc portion arranged close to the grain delivery member, and a flat portion connected with the arc portion.