The invention provides a gravel screening device for buildings. The device comprises a shell, a plurality of screen nets, a plurality of vibrating mechanisms, a stirring mechanism and a driving mechanism, wherein the screens are obliquely disposed in the shell in parallel in sequence from top to bottom; each pair of vibrating mechanisms is arranged between every two adjacent screen nets; cams of the vibrating mechanisms drive a pair of floating blocks of the vibrating mechanisms to move so as to make the floating blocks impact on the corresponding screen nets; the stirring mechanism comprisesa plurality of stirring plates and a pulling rope; the stirring plates are slideably disposed on guiding columns of a cavity; the stirring plates are perpendicular to the screen nets; the pulling ropeconnect all the stirring plates in sequence together; and the driving mechanism comprises a motor, a first transmission mechanism and a second transmission mechanism, wherein the motor drives all thevibrating mechanisms to work together through the first transmission mechanism, and meanwhile the motor drives all the stirring plates to reciprocate together through the second transmission mechanism. The gravel screening device for buildings can achieve uniform vibration and is high in working efficiency and good in screening effect.