Mining of high methane coal mines is characterized by high respiratory dust and high gas content, which can easily cause pneumoconiosis and gas explosion. At present the dust suppressant used to reduce dust concentration has been widely used in various industries, but in the field of dust suppressant mixing uniformity and dust reduction effect research needs to be strengthened, and the high gas content of high gas mines requires the device to use non-electric structure, so it is necessary to carry out research on non-electric equipment to improve dust reduction efficiency, optimize the dust suppressant mixing device structure, improve the dust suppressant mixing uniformity and dust reduction efficiency, improve the The working environment of underground personnel. Through the literature review of dust suppressant device working principle and application status, determine the new dust suppressant mixing device through hydration to achieve premixing function and secondary dynamic mixing function; through the dust suppressant premixing solution liquid level - titration flow experiment and premixing concentration - titration flow experiment, determine 1% concentration of dust suppressant as premixing solution titration concentration; through the valve structure - titration flow change relationship experiment, determine Valve diameter of 3mm; SolidWorks software to build 500mm × 500mm × 320mm premixing box, 500mm × 500mm × 80mm mixing box; by building a simulation of dust reduction experimental platform to carry out natural settlement of coal dust, water spray dust reduction, dust suppressant direct mixing dust reduction and new dust suppressant mixing device dust reduction four kinds of control experiments, to get within 30min The dust reduction efficiency of the four dust reduction methods is 84.01%, 88.44%, 92.17% and 95.54% in order, and finally the research and development of dust suppressant uniform mixing and efficient dust reduction device is realized.