Provided are a water drainage valve for a double drum washing machine and a double drum washing machine using the water drainage valve. The water drainage valve includes 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, and valve plugs (13 and 23) disposed within water drainage valve bodies (1 and 2). The valve plugs (13 and 23) include a first valve plug (13) inside the first water drainage valve body (1) and a second valve plug (23) 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 is configured to drive the first valve plug (13) to move to control the first water drainage valve body (1) to open or close and drive the second valve plug (23) to move to control the second water drainage valve body (2) to open or close. And the first water drainage valve body (1) is in a closed state when the second water drainage valve body (2) is in an open state.
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