Abstract: The underground coal mine roadway explosion often causes extremely serious disaster. Based on the limitations of the common explosion-proof facilities in roadways in our country, this paper studies the principle, technical indexes and performance of automatic powder spraying fire extinguishing explosion suppression system in underground coal mines. Regional automatic powder spraying fire extinguishing explosion suppression system will change traditional passive fire explosion suppression of coal mine to active rapid fire explosion suppression, and achieve good fire explosion suppression effect, which has a certain effect on safety protection for the coal mine compressor plant, electrical and mechanical chamber and other places.