Abstract: In order to explore the optimal construction parameters of the ecological cover film, a two-factor experimental design was adopted, and a control group was set up to conduct 16 dust suppression studies on the concentration and dosage of different ecological film. The discharge of PM₁₀ and PM_2.5 in all 16 treatments at 4 h, 1 month and 3 months after construction was smaller than that of the control group. At 4 h and 1 month after the end of construction, the concentration and dosage of different ecological film had a significant effect on PM₁₀ and PM_2.5 emissions (P< 0.01). With the increase of the concentration and dosage of ecological film, PM₁₀ and PM_2.5 emissions showed a decreasing trend. Three months after the completion of the construction, due to the degradation of the ecological cover film, different ecological cover film concentrations had no significant effect on PM₁₀ and PM_2.5 emissions (P>0.05), and the unit area consumption had a significant effect on PM₁₀ and PM_2.5 emissions, PM₁₀ and PM_2.5 emissions decreased as the amount of unit area increases. When the ecological covering film concentration is 2%, and the unit area dosage is 20 L/m²,the dust suppression effect is the best. Its construction is completed in 4 hours, and the PM₁₀ and PM_2.5 emissions in 4 hours, 1 month, and 3 months are 118 and 18, 101 and 15, 99 and 17μg/(m³·h), respectively.