Abstract: Some conclusions are obtained by comparing the characteristics of the residual-oil emulsion which adding with paste starch for dust control with residual-oil emulsion in the laboratory.Sprayed with the compounded material, its anti-evaopration ability is obviously better than residual-oil emulsion, and its function for dust control can last long.Additionally, it not only can use for roadway dust control, but also can use for various site of heaping floury material dust control, so having a excellent practical value and bright developing future.