A refrigerator, comprising: a refrigerator body having a cooling space, a first storage space, and a second storage space arranged below the first storage space; an air duct assembly installed in the refrigerator body with the cooling space located at a rear side of the air duct assembly and the second storage space located at a front side of the air duct assembly, wherein the air duct assembly has an accommodating cavity, a plurality of air passages, and a plurality of air supply ports opening forwards to transport air to the second storage space; and the plurality of air passages comprises a first air passage and a plurality of second air passages; and a branched air supply apparatus installed in the accommodating cavity, wherein the branched air supply apparatus has a peripheral wall portion; a plurality of air outlets is arranged on the peripheral wall portion; and the plurality of air outlets comprises a first air outlet and a plurality of second air outlets; and wherein the first air passage is configured to connect the first air outlet to the first storage space; and each of the second air passages is configured to connect one of the second air outlets to one or more of the air supply ports, and each of the second air outlets is connected with at least one of the second air passages, characterized in that the air duct assembly comprises a rear housing portion and a front cover installed at a front side of the rear housing portion, wherein the accommodating cavity and the plurality of air passages are defined by the rear housing portion and the front cover, and the plurality of air supply ports is arranged on the front cover, and wherein the rear housing portion comprises a rear housing and at least one air passage bridge arranged in the rear housing; and a front side and a rear side of each air passage bridge are configured to partially or completely define one of the air passages, so that the air passage at the front side of the air passage bridge bypasses the air passage at the rear side of the air passage bridge. a refrigerator body having a cooling space, a first storage space, and a second storage space arranged below the first storage space; an air duct assembly installed in the refrigerator body with the cooling space located at a rear side of the air duct assembly and the second storage space located at a front side of the air duct assembly, wherein the air duct assembly has an accommodating cavity, a plurality of air passages, and a plurality of air supply ports opening forwards to transport air to the second storage space; and the plurality of air passages comprises a first air passage and a plurality of second air passages; and a branched air supply apparatus installed in the accommodating cavity, wherein the branched air supply apparatus has a peripheral wall portion; a plurality of air outlets is arranged on the peripheral wall portion; and the plurality of air outlets comprises a first air outlet and a plurality of second air outlets; and wherein the first air passage is configured to connect the first air outlet to the first storage space; and each of the second air passages is configured to connect one of the second air outlets to one or more of the air supply ports, and each of the second air outlets is connected with at least one of the second air passages, characterized in that the air duct assembly comprises a rear housing portion and a front cover installed at a front side of the rear housing portion, wherein the accommodating cavity and the plurality of air passages are defined by the rear housing portion and the front cover, and the plurality of air supply ports is arranged on the front cover, and wherein the rear housing portion comprises a rear housing and at least one air passage bridge arranged in the rear housing; and a front side and a rear side of each air passage bridge are configured to partially or completely define one of the air passages, so that the air passage at the front side of the air passage bridge bypasses the air passage at the rear side of the air passage bridge.