Air duct assembly of air-cooled refrigerator

The utility model discloses an air duct component of an air-cooled refrigerator, which comprises an air duct shell, an air supply duct is arranged in the air duct shell, a shunting fork is arranged in the middle of the air supply duct, and secondary air ducts are arranged at two ends of the shunting fork; the flow dividing mechanism comprises flow dividing air ducts connected with the secondary air ducts and air outlets formed in the flow dividing air ducts; the adjusting mechanism comprises an extending air duct used for adjusting the length of the secondary air duct and a first connecting assembly used for connecting the extending air duct and the secondary air duct, the secondary air duct is of a two-section structure, and the two-section type secondary air duct is spliced through the extending air duct. The length of the sectional type secondary air duct is adjusted through the extending air duct in the adjusting mechanism, so that the extending air ducts with different sizes can be replaced for refrigera