Abstract: In order to grasp the migration laws of high concentration dust at fully mechanized excavation face of rock roadway under the condition of forced ventilation. Taking concentrated transport lane in the south limb of Xingdong Mine as the background, the mechanism of dust production at fully mechanized excavation face is analyzed deeply, the discrete phase model (DPM) for computational fluid mechanics is used for numerical simulation research of dust particle migration laws and concentration distribution at the ventilation process of fully mechanized excavation face. The simulation results show that the stability of the airflow field is poor and the dust concentration is higher in the range of 20 m from the working face, then gradually decreases and tends to be stable along the way, and the dust concentration of the belt conveyor is obviously higher than that of the sidewalk.