The present invention provides a washing machine drainage structure for a washing machine in which there is not water between an inner tub and an outer tub in washing and rinsing processes. The drainage structure comprises a ball valve (33) and a driving device for controlling opening and closing of the ball valve (33), a drainage outlet is arranged at a bottom wall of an inner tub (1), a water inlet end of the ball valve (33) is communicated with the drainage outlet, and the ball valve (33) is driven by the driving device to be closed in the washing and rinsing processes and opened in draining and dehydrating processes. According to the drainage structure provided by the present invention, the ball valve (33) is driven by the driving device to be closed or opened so as to close or open the drainage outlet, thereby implementing drainage; and the drainage structure provided by the present invention has a simple structure and is convenient to be mounted.
