The invention relates to a sand screening device used for building construction. The sand screening device comprises a base plate, a support device, a discharging device, a frame body, a rotating device, a support frame device, a filtering device and a material collecting device, wherein a first fixing block and a first material collecting box are arranged on the base plate; the support device comprises a first support block, a pedal plate, a first support rod, a transverse plate, first springs, a second support block and a first magnet; the discharging device comprises a discharging frame, a second spring, a first jacking and propping block, a push block, a push rod, a vertical plate and third springs; a first through hole, a first transverse rod and a fixing rod are arranged on the frame body; the rotating device comprises a motor, a first support frame, a rotating shaft, a rotating frame, a concentrated ring, a second transverse rod, fourth springs, a third transverse rod, a first vertical rod and a fourth transverse rod; and the support frame device comprises a second support frame, a first oblique rod, a second vertical rod, a third support frame, a fifth transverse rod, a fourth support frame, a sixth transverse rod and a third filter net. The sand screening device used for building construction has the benefits as follows: sand needing to be screened can be fully screened, and the screening efficiency is high.