Abstract: The present invention discloses an air duct shielding device and an air-cooled refrigerator; the air duct shielding device includes: a fan base having a plurality of air outlets; a first adjusting part having a rotary disc portion and a plurality of first shielding sheets arranged at intervals, the first adjusting part being configured to controllably rotate around an axis of the rotary disc portion; and a second adjusting part provided between the first adjusting part and the fan base, the second adjusting part having a plurality of second shielding sheets arranged at intervals; wherein when the first adjusting part rotates around the axis of the rotary disc portion, the second adjusting part is driven to rotate, such that the first shielding sheet and/or the second shielding sheet completely shield(s), partially shield(s) or completely expose(s) each air outlet, thereby adjusting an air outlet area of each of the plural air outlets.