Abstract: In order to solve the practical problems of serious dust pollution in coal mine and low dust reduction efficiency of conventional spray dust reduction technology,an active agent coupling magnetized water dust reduction technology is pro posed.Based on the liquid atomization model in Comsol software,a simulation model of spray droplet motion was established, and the changes of droplets of different dust-reducing solutions in a specific gas phase flow field were obtained.A simulation test platform for active magnetized water spray dust reduction was built to compare the dust reduction efficiency of active water mist magnetization and ordinary water.The experimental results show that the total dust and respirable dust suppression effi ciency of the active magnetization technology are increased by 4.8 and 16.5 persent point respectively compared with the ordi nary spray dust suppression,which fully proves that the active magnetized water can effectively improve the dust reduction effi ciency.Based on the simulation test,the active magnetized water spray dust suppression device was designed and applied to the No.81 transfer point of Shendong Bulianta Coal Mine.The field application shows that the dust removal efficiency of respirable dust and total dust by active magnetized water mist is increased by 12.55 and 11.27 persent point respectively compared with that by ordinary spray of untreated water.It is proved that the coupling technology of active agent and magnetization can effec tively improve the efficiency of dust reduction,which has theoretical and practical significance for promoting the development of coal mine dust removal technology.