An air-cooled refrigerator, comprising a cabinet, wherein the cabinet is provided with a cellar compartment, at least one storage compartment, and an air duct assembly (300, 400) communicating the cellar compartment and the at least one storage compartment; the air duct assembly (300, 400) is provided with an accommodating cavity with a rearward air inlet, and a plurality of air supply communicating holes is formed in a peripheral wall of the accommodating cavity; air in the cellar compartment enters the at least one storage compartment via the plurality of air supply communicating holes; the air-cooled refrigerator further comprises an air door shielding device; the air door shielding device is provided with a shielding part, and the shielding part is provided with a plurality of air baffles; the shielding part is rotatably disposed in the accommodating cavity, so as to have shielding positions for the plurality of air baffles to completely shield all the air supply communicating holes, thus further preventing the air in the cellar compartment from entering the at least one storage compartment via the plurality of air supply communicating holes during the defrosting of the air-cooled refrigerator; a bottom of a sidewall of the accommodating cavity is provided with a water guide groove inclined rearward and downward, and the air duct assembly (300, 400) is provided with a water outlet hole communicating a rear side of the air duct assembly (300, 400) with a rear end of the water guide groove, so that water in the accommodating cavity flows out of the air duct assembly (300, 400) via the water guide groove and the water outlet hole, wherein the air door shielding device further comprises a centrifugal wind wheel mounted within the accommodating cavity and configured to draw an airflow from the air inlet and urge the airflow to enter each of the air supply communicating holes in a circumferential direction and/or radial direction thereof, wherein the air door shielding device further comprises: a base, wherein the shielding part is further provided with a turntable portion rotatably mounted on the base; the plurality of air baffles extends from the turntable portion to a rear side, and is disposed at intervals in a circumferential direction of the turntable portion; and the centrifugal wind wheel is mounted on the base; a motor, disposed on a radial outer side of the shielding part, and mounted on the base; a driving gear, mounted on an output shaft of the motor; and a driven gear, mounted on the turntable portion or integrally formed with the turntable portion, and meshed with the driving gear. the air duct assembly (300, 400) is provided with an accommodating cavity with a rearward air inlet, and a plurality of air supply communicating holes is formed in a peripheral wall of the accommodating cavity; air in the cellar compartment enters the at least one storage compartment via the plurality of air supply communicating holes; the air-cooled refrigerator further comprises an air door shielding device; the air door shielding device is provided with a shielding part, and the shielding part is provided with a plurality of air baffles; the shielding part is rotatably disposed in the accommodating cavity, so as to have shielding positions for the plurality of air baffles to completely shield all the air supply communicating holes, thus further preventing the air in the cellar compartment from entering the at least one storage compartment via the plurality of air supply communicating holes during the defrosting of the air-cooled refrigerator; a bottom of a sidewall of the accommodating cavity is provided with a water guide groove inclined rearward and downward, and the air duct assembly (300, 400) is provided with a water outlet hole communicating a rear side of the air duct assembly (300, 400) with a rear end of the water guide groove, so that water in the accommodating cavity flows out of the air duct assembly (300, 400) via the water guide groove and the water outlet hole, wherein the air door shielding device further comprises a centrifugal wind wheel mounted within the accommodating cavity and configured to draw an airflow from the air inlet and urge the airflow to enter each of the air supply communicating holes in a circumferential direction and/or radial direction thereof, wherein the air door shielding device further comprises: a base, wherein the shielding part is further provided with a turntable portion rotatably mounted on the base; the plurality of air baffles extends from the turntable portion to a rear side, and is disposed at intervals in a circumferential direction of the turntable portion; and the centrifugal wind wheel is mounted on the base; a motor, disposed on a radial outer side of the shielding part, and mounted on the base; a driving gear, mounted on an output shaft of the motor; and a driven gear, mounted on the turntable portion or integrally formed with the turntable portion, and meshed with the driving gear. a base, wherein the shielding part is further provided with a turntable portion rotatably mounted on the base; the plurality of air baffles extends from the turntable portion to a rear side, and is disposed at intervals in a circumferential direction of the turntable portion; and the centrifugal wind wheel is mounted on the base; a motor, disposed on a radial outer side of the shielding part, and mounted on the base; a driving gear, mounted on an output shaft of the motor; and a driven gear, mounted on the turntable portion or integrally formed with the turntable portion, and meshed with the driving gear.