Screening assembly for building sand

The utility model relates to the field of buildings, and discloses a building sand screening assembly which comprises a machine body, a screening structure is movably installed in the machine body, a fixing ring is fixedly installed in the machine body, the top of the fixing ring is rotationally connected with a gear ring, and a screening plate is fixedly installed in the gear ring. When the motor is started, the rotating shaft is controlled to rotate, the rotating shaft is meshed with the first gear through the second gear fixedly installed outside the rotating shaft, the first gear is meshed with the gear ring, and therefore the motor can drive the sieve plate to rotate while driving the rotating shaft to rotate; at the moment, sand needing to be screened is fed into the top of a screening plate in the machine body from a feeding pipe opening, screening can be started, in the rotating process of the screening plate, the sand on the top of the screening plate can be bulldozed to be flat through a push plate,