The utility model discloses a spraying system. Structural characteristics of two sides of a temporary road on a construction site and near-edge protective guard bars around a building are fully utilized; the horizontal rods of the edge protective guard bars are used as water conveying pipes to supply water to the spray heads and the atomization spray heads at the tops of the spray branch pipes; due to the fact that the horizontal rods of the edge protective guard bars are also used as water conveying pipes, comprehensive dust falling of the whole construction site can be achieved, flying dustof the construction site can be reduced and controlled in an extremely short time, precious water resources can be remarkably saved, labor force is saved, and good economic benefits and social benefits are achieved.