Provided are a water drainage valve for a dual-drum clothes washing machine, and a dual-drum clothes washing machine using said water drainage valve. The water drainage valve comprises: a first water drainage valve body (1) connected to a first outer drum and a second water drainage valve body (2) connected to a second outer drum; valve plugs (13, 23) arranged inside the water drainage valve bodies (1, 2), said valve plugs (13, 23) comprising: a first valve plug (13) arranged inside the first water drainage valve body (1) and a second valve plug (23) arranged inside the second water drainage valve body (2); and a drive assembly connected to the first valve plug (13) and the second valve plug (23); the drive assembly drives the first valve plug (13) to move, controlling the first water drainage valve body (1) to open or close, and the drive assembly drives the second valve plug (23) to move, controlling the second water drainage valve body (2) to open or close; when the second water drainage valve body (2) is
