The invention provides a distributor box assembly, a detergent feeding device and a washing machine. The distributor box assembly comprises a liquid storage box, a drawer and connecting hoses, liquid storage cavities are defined by the liquid storage box, and a liquid inlet and a liquid outlet which are communicated with the liquid storage cavities are formed in the liquid storage box; liquid feeding cavities are defined by the drawer, and a first feeding port and a discharging port which are communicated with the liquid feeding cavities are formed in the drawer; the connecting hoses are connected with the liquid storage box and the drawer and communicated with the discharging port and the liquid inlet, and the connecting hoses are used for feeding the detergent in the liquid feeding cavities into the liquid storage cavities. According to the distributor box assembly, the liquid storage box is separated from the drawer, so that rigid connection between the liquid storage box and the drawer is converted into flexible connection, thus the liquid storage box does not synchronously move with the drawer, the loading weight of a spring basically keeps constant with that of manual drawing by a user, the spring force needed during ejecting of the drawer and the ejecting speed also basically keep constant, and thus the consistency of user experience is ensured.