Concrete gravel screening device

A concrete gravel screening device belongs to the technical field of concrete production and comprises a screening box and supporting legs connected to the bottom of the screening box, a feeding hopper is arranged at the top of the screening box, a screening tank is connected to the top end of the interior of the screening box and located under the feeding hopper, and the screening tank is composed of a cylindrical part and an arc-shaped part. A stirring shaft is rotationally connected into the screening tank, stirring blades are connected to the surface of the stirring shaft at equal intervals, the stirring blades are attached to the bottom of the arc-shaped part when rotating, screening holes are formed in the side wall of the cylindrical part, a material guiding plate is obliquely arranged between the bottom end of the side of the cylindrical part and the inner wall of the screening box, and a first discharging opening is formed in the side wall of the screening box; and the downwards-inclined end of the m