Water retaining dam for water conservancy and hydropower engineering

The utility model relates to the field of retaining dams, and discloses a retaining dam for water conservancy and hydropower engineering, which comprises a main frame, a first servo motor is arranged at the front end of the outer wall of the upper end of the main frame, a second servo motor is arranged in the middle of the outer wall of the upper end of the main frame, and a third servo motor is arranged at the rear end of the outer wall of the upper end of the main frame. A protective cover is arranged on the outer wall of the upper end of the main frame, and a first rotating body, a second rotating body and a third rotating body are arranged in the main frame. According to the water retaining device, the first servo motor, the second servo motor and the third servo motor are started to drive the first rotating body, the second rotating body and the third rotating body to rotate, when water needs to be retained, the rotating bodies are tightly attached to the connecting blocks, and therefore the water retain