Abstract: Through field measurement and analysis of dust concentration in 245 belt haulage roadway, we found that the dust concentration at transfer point and drop point exceeded the standard. Therefore, the physical model of underground transportation roadway is established, and the dust movement in belt transportation roadway is numerically simulated by Fluent software, by determining the law of dust movement in roadway. The results show that, when the average wind speed is 3 m/s, the dust concentration in roadway is the lowest. The dust concentration in the roadway is proportional to the belt running speed. According to the results of numerical simulation, combined with the actual situation of a large metal mine, a set of dust reduction measures suitable for belt haulage roadway were formulated. After the measures were installed and implemented, the falling point with the highest dust concentration in the belt haulage roadway was reduced from 60.5 mg/m³ to 9.5 mg/m³, with a remarkable dust reduction effect. Thus, the working environment in the roadway was greatly improved.