Abstract: In order to study the excellent application of rotating fine water mist in dust reduction, gas-liquid mist field and gas-solid flow field are focused in the research from the perspective of water mist existing time, which qualitatively analyzes dust reduction characteristics of main and auxiliary in rotating fine water mist. According to the unique shunt and stratification, effective scope of submerged body, entrainment and Magnus effect are calculated and analyzed with the theory of fluid dynamics, and the mechanism of dust reduction by rotating water mist is expounded. The dust removal zones can be mainly divided into the recirculation zones, the entrainment zones, Magnus areas and escape zones.