Dust fall device for highway engineering construction

The utility model discloses a dust fall device for highway engineering construction, which relates to the field of highway engineering and comprises a bottom plate, a water tank fixedly arranged on one side of the top end of the bottom plate, a support column fixedly arranged on the other side of the top end of the bottom plate, a mounting plate fixedly arranged on one side of the support column and a fixed plate arranged at the bottom of the mounting plate, the fixing plate is located between the water tank and the mounting plate. A motor drives a first rotating rod and a first gear to rotate slowly, the first gear drives two third gears and two third rotating rods to rotate, the two third rotating rods drive two rotating discs to rotate, the two rotating discs drive sawteeth to rotate, and the sawteeth drive a second gear to rotate back and forth within a certain angle range. A second gear drives a second rotating rod and a connecting plate to rotate back and forth within a certain angle range, so that the