Abstract: On the basis of analyzing the speed wind around shearer and characteristics of dust production in cutting coal，optimized the system of dusk source tracking and high-pressure spray outside of coal mining machine，space vertical crossing high-pressure spray formed in tumbler，is used to control the dust production in cutting coal，the effect is obvious，the practice showed that the total dust removal efficiency at the machine operator reached 91.4%，the respirable dust removal efficiency reached 90.4%；the total dust removal efficiency at 10m place behind the heading machine reached 92.9%，and the respirable dust removal efficiency reached 92.3%，effectively solved the problem of dust hazards at the machine operator and 10m place behind the heading machine．