Dust is one of the major disasters in coal mine production process. For coal mine dust prevention and control work spray dust is very important. The main source of dust and field test the dust concentration distribution in full-mechanized excavation face were introduced, and two efficient plans for spray dust were presented. Without the traditional large volume of water tanks and complicated water control system, plan A used booster pumps to design a small size and light weight pump group, which installed on the body of machine, and got high-pressure water though the specific conversion of booster pumps. Plan B getting high-pressure water was through the hydraulic oil of the machine to drive a booster pump which based on the hydraulic pump as a core. Both schemes were overcame the shortcomings and the insufficiency of traditional methods and obtained very good dustproof effects combined with the use of additive equipment of dust suppression after application. Dust highest rate reached 84%.