Water conservancy and hydropower dam bottom sand cleaning device

The utility model belongs to the technical field of dam nursing, and particularly relates to a water conservancy and hydropower dam bottom sand cleaning device which comprises a sand pump, a sand cleaning ship body fixedly connected with the sand pump and a sand filtering and screening assembly installed on the surface of the sand cleaning ship body. The sand filtering and screening assembly comprises a sand filtering frame and a filter screen, the sand filtering frame is of a box structure which is obliquely arranged and provided with an open top and an open bottom, the sand filtering frame is arranged on the surface of the sand cleaning ship body, and a connecting column is arranged on the side, close to the sand cleaning ship body, of the sand filtering frame; the sand filtering frame is fixedly connected with the sand cleaning ship body through the connecting column, and the filter screen is fixed to the inner wall of the sand filtering frame; multi-stage screening is adopted, screening and water filterin