The utility model discloses a job site dust fall watering lorry, it includes the handcart the handcart on install a water storage tank through the mount the water storage tank be close to to open on one side lateral wall of handlebar and have the water injection hole the antetheca lower part intercommunication of water storage tank have an upper portion galvanized pipe the upper portion galvanized pipe on install switching valve, with upper portion galvanized pipe vertically direction on the intercommunication have one with the handcart automobile body with wide lower part galvanized pipe the lower part galvanized pipe on spaced apartly have a plurality of water sprinkling hole the both ends shutoff of lower part galvanized pipe have the end cap. Whether the usable switching valve control after water is filled to the water storage tank of this device sprinkles, and flexible is convenient, can have corresponding to carry out raise dust management and control such as road, and use cost is low, and the suitability is strong.