The invention provides a refrigerator door body assembly, and belongs to the field of refrigerators. The refrigerator door body assembly comprises a door lining and a bottle base, wherein the door lining is arranged on the inner side surface of a refrigerator door body, and comprises a first vertical beam and a second vertical beam, which extend vertically, and are distributed at the transverse two sides of the refrigerator door body; the bottle base is arranged between the first vertical beam and the second vertical beam; the bottle base is provided with a first side surface and a second sidesurface which separately face towards the first vertical beam and the second vertical beam; rotatable gears are arranged at the inner side of the first vertical beam and the inner side of the secondvertical beam; the first side surface and the second side surface are separately equipped with tooth slots which are matched with the gears; and the tooth slots are equipped with a plurality of toothslot teeth which are vertically distributed and are engaged with the gears, so that the bottle base can realize longitudinal two-way movement relative to the door linking when the gears rotate in thetooth slots. The refrigerator door body assembly can conveniently and quickly realize consistent height regulation of the bottle base in the horizontal direction.