The invention relates to a screening device, in particular to a multilevel gravel screening device for building construction. The technical purpose to be achieved is to provide a multilevel gravel screening device for building construction with a high screening precision level. In order to achieve the above technical purpose, a multilevel gravel screening device for building construction is provided, which comprises a base plate, a side plate, an elevating mechanism, a pulling mechanism, a knocking mechanism, a cushioning mechanism, an adjusting mechanism, L-shaped supporting rods, a top plate, a feeding hopper, fourth sliding blocks, third sliding rails, screening frames, a mounting tank, first cover plates, fourth sliding rails, a collecting frame, fourth elastic elements, fifth sliding rails, fifth sliding blocks, sixth supporting rods, sixth sliding blocks, second pulling wires, second fixed pulleys and inserting rods; the side plate is fixedly connected to the top of the base plate in the vertical direction, and the L-shaped supporting rods are fixedly connected to the top of the side plate. By means of the device, the effects that the screening precision level is high, the screening frames are not easily blocked, and the utilization of gravel is high are achieved.