Abstract: Fluent numerical simulation software was used to conduct quantitative analysis on spray characteristic parameters of the nozzle, and a total of 5 simulation schemes were established, including wind speed was 2 m/s, spray pressure was 8.0 MPa, 10.0 MPa and 12.5 MPa respectively, and spray pressure was 8.0 MPa, wind speed was 1 m/s and 3 m/s respectively, the distribution of droplet concentration and droplet velocity were analyzed. The simulation results show that when the lateral wind speed increases from 1 m/s to 3 m/s, the spray range decreases from 4.0 m to 1.8 m, the maximum concentration of fog drops on the vertical plane 2 m from the nozzle decreases from 0.12 kg/m³ to 0.03 kg/m³, indicating that the higher the wind speed is, the faster the droplet velocity decays, and the smaller the droplet concentration and velocity are when they reach the same plane; when the spray pressure increases from 8.0 MPa to 12.5 MPa, the spray range increases from 2.4 m to 3.0 m, the maximum concentration of fog drops on the vertical plane 2 m from the nozzle increases from 0.08 kg/m³ to 0.10 kg/m³, the proportion of fog drops with particle size less than 25 μm to 30 μm increases from 70% to 90%, indicating that the higher the spray pressure is, the better the spray effect is, and the stronger the anti-wind ability of fog drops is, and when reach the same plane, the smaller the particle size is, the larger the mass concentration and velocity are.