Water pump and clothes treating apparatus

The utility model relates to a water pump and a clothes processing device, the water pump comprises a pump shell, the pump shell is provided with an impeller cavity, and the cavity wall of the impeller cavity is provided with a circulation opening and a water drainage opening; the inner cavity wall of the impeller cavity comprises a first cavity wall part, the first cavity wall part comprises a first sub-cavity wall and a second sub-cavity wall, the first sub-cavity wall is arranged opposite to the drainage port and connected with the inner wall of the drainage port, and the second sub-cavity wall is arranged opposite to the circulation port and connected with the inner wall of the circulation port; in the direction from water flow in the impeller cavity to the water outlet, the diameter of the arc where the first sub-cavity wall is located is gradually increased; the diameter of the arc where the second sub-cavity wall is located is gradually increased in the direction from water flow in the impeller cavity