Abstract: With the increase of mining intensity and mining efficiency, dust concentration in the working face is further increased, resulting in mine safety hazards and damaging the health of workers.In order to reduce the dust concentration of working face, taking the 10404 working face of Shanxi coking coal Xishan coal and electricity company Jinbangde coal industry as the research object, the dust prevention technology of the working face is studied by field measurement and theoretical analysis.The measured analysis shows that the coal cutting of shearer and the moving of hydraulic support are the main sources of dust in the working face, and the dust concentration gradually decreases with the increase of the distance from the dust source.Based on the dust concentration and distribution law of the working face, a comprehensive dust prevention technology of “working face multi-module networking spray dust reduction system+shearer drum foam dust suppression system” was designed and applied in the field.The efficiency of dust reduction measures after the optimization of observation data is more than 90% higher than that before the optimization, which effectively reduces the dust concentration of the working face and ensures the safety of mine production and the health of workers.