Abstract: Aimed at dust raising on transport roadways in open mines,the complex suppressant was researched and applied in practice.Two excellent complex suppressants were developed through theoretical analysis and experiments,and a comparison was made between their performances.The moving rules of dust on transport roadways in open mines were simulated by using FLUENT software,and the most appropriate area was determined for dust monitoring.Practical applications show that by using the complex suppressant the mass concentration of dust is below 4 mg·m^-3,and the effective time of dust suppression is 6h.