Dust falling device for civil engineering construction

The utility model discloses a dust falling device for civil engineering construction. The dust falling device comprises a water tank, a spraying head, a lifting rod and a rotating table, the rotating table is rotatably installed on a shell of the water tank, the lifting rod is slidably connected with the rotating table, the spraying head is rotatably connected with the top end of the lifting rod, the spraying head is communicated with a water storage chamber of the water tank, and the water storage chamber is communicated with the water tank. The rotating table can rotate in the horizontal direction to drive the lifting rod to rotate in the circumferential direction, and the lifting rod can slide in the vertical direction to adjust the height of the spraying head. The height of the spraying head is adjusted through the lifting rod, the angle of the spraying head is adjusted through the rotating table, and the spraying head can rotate relative to the lifting rod, so that multiple spraying angles and different