Construction-site automatic spraying dust suppression system

The utility model is applicable to the technical field of construction site dust suppression, provides a construction-site automatic spraying dust suppression system and aims at solving the technical problem of suppressing dust by collecting and utilizing rainwater and wastewater in construction sites in the prior art. The construction-site automatic spraying dust suppression system comprises a water storage system for collecting and treating rainwater and wastewater, a water pump and a sprinkler; the sprinkler comprises a main pipeline, a service valve, a branch pipeline, and a nozzle which is fixedly mounted on the branch pipeline and rotates at a plurality of angles. The water storage system is used for performing multi-stage desilting treatment on the collected rainwater, wastewater, construction underground water, seawater and the like, and the treated water is sprinkled to the construction sites orderly by use of the water pump, the main pipeline, the branch pipeline and the nozzle to flush the ground of the construction sites, thereby achieving the purpose of suppressing dust; meanwhile, the natural water resources and the wastewater generated in the construction sites are utilized sufficiently, and therefore, the water resources can be saved and lots of labor can be reduced.