Sand sieving device for building construction

The invention discloses a sand sieving device for building construction. The sand sieving device comprises a feeding box, is simple in structure and stable in operation and drives a sieving cylinder through a second gear motor to rotate so as to carry out coarse sieving and layering sieving on gravel; and a sieve plate is in running fit with lifting to carry out secondary sieving on gravel, so that the sieving efficiency and quality of gravel are improved. A feeding hopper and a residue discharging plate can carry out overturning adjustment, so that coarse residues on the upper side and the inner side of the sieving cylinder can be conveniently discharged; a first gear motor drives an outer pipe and an inner pipe to rotate, so that the sieve plate rotates in a slide rest along with the inner pipe, and sand falling down from a discharging plate is uniformly distributed on the sieve plate under the action of centrifugal force; through cooperating with motion of the sieve plate in the vertical direction, the gra