The invention discloses a washing machine overflow rinsing control method and a washing machine. The method comprises: a step 1, controlling the washing machine to perform overflow rinsing; a step 2:acquiring and determining whether the water level in a washing machine barrel exceeds the upper limit water level on the basis of detection data of a water level sensor; a step 3, closing a water inlet valve of the washing machine if so; a step 4, opening the water inlet valve to inject water into the washing machine barrel after the set time; and a step 5, repeating the steps 2 to 4 until the overflow rinse ends. In the step 3, after the water inlet valve is closed, the drainage setting time is set, and then the water inlet valve is directly opened, and water is re-injected into the barrel, and in this control mode, if the drainage valve is blocked by debris such as threads and the drainage is not smooth, the time condition of the set time can prevent the water inlet valve from being frequently closed and opened due to poor drainage, and the technical problem that the existing washing machine has obvious noise during the overflow rinsing due to poor drainage can be solved.