Abstract: This paper studies the nozzle selection and arrangement about the roadway sprinkler. To increase atomizing angle, the spiral nozzle was selected. Through the Fluent fluid mechanics, the water pressure and flow diagram were received. Six nozzles installation distribution were determined by the space geometry. And through the Fluent software, the simulation analysis of the spray particle was made and the spray path diagram was received, which had verified the rationality of the nozzle selection and the arrangement.