Fecha de publicación: 02/02/2024 Fuente: WIPO "circular economy" The utility model discloses a concrete production device which comprises a vibrating mechanism, a screening mechanism is arranged at the top of the vibrating mechanism, a container is movably connected to the bottom of the inner wall of the vibrating mechanism, the screening mechanism comprises a base, a first movable block is slidably connected to one side of the inner wall of the base, and a second movable block is slidably connected to the inner wall of the other side of the base. A first supporting frame is fixedly installed on the outer side wall of the first movable block, a second supporting frame is fixedly installed on the top of the outer side of the second movable block, the screening mechanism comprises a first screening plate, a sliding block is fixedly installed at the bottom of the first screening plate, the bottom of the sliding block is slidably connected with the base, and the outer side wall of the first screening plate is fixedly connected with the first supporting frame. According to the concrete screening machine, the two layers of screen nets are arranged, concrete is poured into the screen net at the top, the vibrating mechanism at the bottom is started to drive the two layers of screen nets to conduct reciprocating screening in different directions, the screen plate at the top layer can screen large particles, and the screen plate at the lower layer is prevented from being blocked.