The invention discloses a building gravel screening device. The building gravel screening device comprises a sand inlet pipe, a screening box, a charging plate, a water tank, a spraying row, a filternet, an air injection machine, a ventilation pipe, an air injection row, a first sieve plate, a second sieve plate, vibration exciters, a partition plate and a blow-off pipe. The sand inlet pipe is arranged at the top end of the screening box, one side of the charging plate is hinged to the inner wall of the top end of the screening box, the water tank is arranged at the top end of the screening box, the water inlet pipe is arranged at the top end of the water tank, and the bottom end of the water tank is connected with a sprayer through a water passing pipe. The first sieve plate and the second sieve plate are obliquely arranged in the screening box, and the vibration exciters are arranged on the lower surface of the first sieve plate and the lower surface of the second sieve box. According to the building gravel screening device, gravel screening is convenient, water flows back into the water tank to be continuously circularly used, the resource is saved, waste is avoided, the structure is simple, usage is convenient, and popularization is facilitated.