The invention discloses a door body assembly for a refrigerator. The door body assembly comprises: a door body, a water tank, a control assembly and a water valve. The water valve comprises a valve body, a draining mouth and a valve element, wherein a valve port communicated with the water tank is arranged on the valve body; a first sealing wall formed by two annular projected parts at an interval is arranged on the valve port; one end of the draining mouth and the valve port are arranged oppositely, and a second sealing wall formed by two annular projected parts at an interval is arranged on one end; and the second sealing wall and the first sealing wall are mutually nested and can be relatively moved along an axial direction. According to the door body assembly for the refrigerator, remained water can be stayed in the draining mouth without being dropped after water is got. In addition, a modularized assembly method is adopted, so that an assembly process is simpler.