Abstract: In order to control the frequent gas and dust explosion accidents in coal mine, this paper puts forward a combustion and explosion suppression system for automatic water curtain which is based on the water mist to prevent the spread of gas and coal-dust explosion. The system contains sensors, controller, the rapid trigger device, the water curtain facilities and water supply system. This paper expounds the principle and functions of the system, and also discusses the implementation methods of each part technically. For the system prototype, its key technical indicator of the system, operating time, is good for inhibiting gas and coal-dust explosion.