Illuminating device capable of conveniently controlling illumination range and used for water conservancy and hydropower engineering

The utility model relates to the technical field of lighting devices, in particular to a lighting device convenient to control lighting range for water conservancy and hydropower engineering, which comprises an arc-shaped frame, the inner wall of the arc-shaped frame is slidably connected with a supporting plate, and the surface of the supporting plate is rotatably connected with a supporting rod through a rotating shaft. A lamp body is fixedly connected to the end, away from the arc-shaped frame, of the supporting rod, an inserting hole is formed in the upper surface of the supporting rod, a limiting mechanism for fixing the position of the lamp body is arranged on the inner wall of the inserting hole, a clamping groove is formed in the inner wall of the arc-shaped frame, and a rolling wheel is movably connected to the inner wall of the clamping groove; the surfaces of the rolling wheels are rotationally connected with a supporting frame. According to the lighting device capable of conveniently controlling t