Abstract: We test the key parameters of negative pressure suction type atomization device by atomization granularity, jet velocity and pressure value performance experiment, and we determine the optimal parameter values range through the analysis of factor levels, and finally carry out dust-fall test. The experimental results show that increasing jet pressure can obviously improve the atomization effect of liquid droplets; the change law of droplets D₅₀ increases first and then decreases with the increase of nozzle diameter; the droplet velocity first increases and then shows a stable decrease trend with the increase of nozzle out quantity. We determine that the nozzle diameter of 3.5 mm and nozzle out quantity of 3 mm are the best parameters through orthogonal analysis; we determine that the jet pressure of 3 MPa is the best parameter by negative pressure value test analysis. The results show that fog particle size of aspirated mixing atomization device reduced by 54.73% by axial flow nozzle dust effect contrast, and the dust control efficiency for the whole dust increased by 20.78%, especially the dust control efficiency of reparable dust increased by 40.24%.