Abstract: With the dust in some of city roads in Beijing as the research object, the change of PM₁₀ and PM_2.5 concentrations before and after spraying a new environment-friendly road dust suppressant was studied. The results showed that the new environment-friendly road dust suppressant could effectively reduce the concentration of PM₁₀, with PM₁₀ reduction effect of 25%. The dust suppressant could also reduce PM_2.5 and absorb nitrogen oxides in the air. The new dust suppressant is thus efficient in controlling road dust and reducing pollution.