Civil engineering dust falling device

The dust falling device comprises a dust removing assembly, and the dust removing assembly comprises a bottom plate, a water tank, a first U-shaped plate, a rotating rod, a rectangular pipe, a spray head, a gear, a second U-shaped plate, a driving motor, a reciprocating lead screw, a toothed plate, a water pump and a hose. The top of the bottom plate is fixedly connected with a water tank, and a first U-shaped plate is welded to the top of the bottom plate. The water pump pumps water from the water tank, the water is discharged into the rectangular pipe through the hose, then the water is discharged into the sprayers through the rectangular pipe for spraying and dust falling treatment, the driving motor drives the toothed plate to move through the reciprocating lead screw, the toothed plate drives the rotating rod to rotate through the gear, and the rotating rod drives the sprayers to rotate through the rectangular pipe. The driving motor continuously works to drive the spray head to circularly swing for spra