The invention discloses a detergent feeding device of a washing machine and the washing machine provided with the detergent feeding device. The detergent feeding device of the washing machine comprises a detergent box, a pumping element, a water distributor and a flow direction control element, wherein a detergent storage cavity and a flushing chamber are formed in the detergent box, and the flushing chamber is provided with a detergent feeding port; an inlet of the pumping element communicates with the detergent box, and an outlet of the pumping element communicates with the flushing chamber, and the pumping element is used for pumping a detergent in the detergent box into the flushing chamber; the water distributor communicates with the flushing chamber, is used for supplying water to the flushing chamber and is provided with water inlet pipes; the flow direction control element is used for controlling one-way circulation of the detergent from the pumping element to the flushing chamber. According to the detergent feeding device of the washing machine, the detergent in the detergent box can be further pumped into the flushing chamber under the action of the pumping element, water can be supplied to the flushing chamber through the water inlet pipes of the water distributor, so that the detergent in the flushing chamber can be dissolved sufficiently by water flow, and further detergent feeding can be realized.