Sand screening device for building construction

The utility model provides a sand screening device for building construction, which is characterized in that a discharge port A and universal wheels are arranged at the bottom of a bottom plate, and hydraulic mechanisms are arranged at two ends of the bottom plate; a box body is welded to the top of a bottom plate, a check block B is welded to the lower portion of the inner wall of the box body, an air cylinder is installed at the bottom in the box body and connected with a connecting rod and a screen through connecting blocks, sliding blocks are installed at the two ends of the screen and matched with guide rails, and a check block A is installed at the top of the guide rails on the inner wall of the box body; a discharge hole B is formed in the wall of the box body at the other end of the sieve plate; a feeding hole is formed in the top of the box body; the sand screening device has the advantages that the three groups of baffle blocks are arranged, so that screened sand directionally slides down, and the s