Abstract: According to the problems and deficiencies of coal mine dust control, a water film dust removal device was designed by using the water film to capture and adsorb the dust, which formed a large section of water film in the roadway, and the numerical simulation and field experiments were carried out. The results showed that after using this device to purify the dust in the roadway, the highest concentration of dust was 3.9%, and the highest purifying rate was 95.5%. Furthermore, the highest concentration of respirable dust was 1.0%, and the highest purifying rate was 94.3%.