Abstract: In order to improve the efficiency of mine dust control and reduce the dust concentration in the working face, we developed a multi-module networking ultrasonic dry fog dust suppression system for the working face through ultrasonic atomization technology, based on the dry fog dust suppression mechanism such as aerodynamics, “cloud” physics principle and Stephen transport flow theory.The system includes two parts: dry fog dust suppression device and intelligent spray control system.The grid centralized control mode based on point is adopted.Multiple points are connected by CAN communication bus to adapt to dust control under different working conditions.The control system is based on CAN communication bus to realize modular control, which is mainly composed of constant pressure water supply module, constant pressure gas supply module, system main control module, water and gas distribution control module and signal acquisition module.The dust reduction effect test results of the 1:1 test platform show that the dust reduction efficiency of the system is more than 90%,and the respirable dust concentration of the working face is reduced to 3 mg/m³ after dust reduction, which effectively reduces the dust concentration of the working face.At the same time, the automation of the dust reduction system is realized, and the universality of the dust reduction system is enhanced.