Abstract: In order to reduce the harm of coal dust to coal mine, strengthen the management of coal dust, using the method of the forced ventilator ventilation experiment, we conducted five groups of ventilation and dust removal experiment in mine ventilation simulation system. Based on the experimental phenomenon and data analysis, we studied migration of coal dust under the condition of the specific speed. The results show that ventilation and dust removal can not completely eliminate coal dust, and only a small amount of coal dust can be excluded. More than 80% of the coal dust will become dust fall and accumulate in the mine roadway. Therefore, we should focus on controlling dust fall, and adopt comprehensive dust removal methods to prevent the secondary blowing dust. In the process of moving with the airflow, the coal dust is obviously blocked by the corner wall of the roadway. It is easy to accumulate coal dust near the upper corner of the coal mining face, and the coal dust in this area should be strengthened.