As one of the main disasters in the coal mine production site "high concentration dust" has great harm, always threatening the safety and efficient production of the mine. Therefore, in order to realize the rapid, healthy and sustainable development of enterprise economy and maintain the occupational safety and health of employees and social stability, it is necessary to control the dust on the working face in the production process. According to the actual measurement, without any dust prevention measures, the dust production of the comprehensive mechanized coal mining face is as high as 80% of the total dust in the mine. When the shearer carries out the normal cutting process, the instantaneous original total dust concentration at the fully mechanized coal mining face can be as high as 1500mg/m3 or more, some even as high as 3000mg/m3 or so, and the instantaneous original total dust concentration at the fully mechanized coal mining face is as high as high as 1500mg, the concentration of respirable dust in the total dust of mining face is close to 60%. A large amount of dust exists in the working area of underground personnel at the same time, which not only pollutes the environment and endangers the physical and mental health of the workers, but also seriously affects the safety production of the mine because of the explosive coal dust. Although the application of coal seam water injection, spray dust reduction and dust removal measures at this stage has reduced the dust concentration of the comprehensive mechanized coal mining face to a certain extent, due to the complex production process, high degree of mechanization, many dust sources and large dust volume of the working face, the dust reduction effect of the existing dust removal technology is not ideal, and the dust hazard is becoming more and more serious. In order to realize the rapid, healthy and sustainable development of enterprise economy and maintain the occupational safety, health and social stability of employees, it is necessary to control the high concentration dust hazards of coal mining face. The research purpose of this project is to master the basic physical and chemical characteristics of dust in coal mining face, reveal the law of airborne dust migration in coal mining face, and analyze the distribution law and relationship of particle size-velocity-concentration in fog field through the combination of theoretical analysis, numerical simulation, experimental test, simulation and field application, On this basis, the high-efficiency anti-blocking atomizing nozzle is developed. At the same time, according to the dust production characteristics of the hydraulic support and shearer in the fully mechanized mining (caving) face, the hydraulic support negative pressure dust reduction technology and equipment that can cover the full-section fog field of the coal mining area and realize negative pressure dust collection and purification, as well as the high-efficiency external spray dust reduction technology and equipment of the combined shearer that can form the dust reduction field that can effectively wrap the shearer, combined with other regional spray dust reduction technology and equipment, the combined spray dust reduction technology and equipment of fully mechanized mining (caving) face are formed. Therefore, the research on efficient dust control technology and equipment of comprehensive mechanized coal mining face is of great significance to effectively reduce the dust concentration in the coal mining area, improve the working environment, and ensure the occupational safety and health of underground workers. The research results of this project can also provide theoretical and technical support for dust prevention and control in similar mines.