Abstract: In order to solve the problem of highly concentration of dust during transport and unloading in the belt conveyor,taking the rectangular straight chute structure as an example,combining with the precipitation mechanism and airflow characteristics of dust, analyzing the force of coal under transporting, obtaining the impact factors on the spread of dust transfer chute structure parameters.Take Zhuan-Longwan Coal Preparation Plant as the background,using the FLUENT software within Euler - Lagrange method to simulate the gas-solid two-phase flow couple,drawing the track of coal in different chute structure parameters.The result shows that:When the chute inclination is bigger, the induced wind is larger;When the cross-sectional area of the chute is the same and the aspect ratio is different, the cross-sectional width is proportional to the chute effect gas-solid area, the number of particles acting, frictional resistance between the particles on the surface and the chute.Through comparing with the actual measurement results, verified the reliability of simulation results,this research can provides the theoretical basis and data support for the structure optimization design of the repeater chute dust control to further improve the development of green production on mining equipment.