Abstract: This paper described the technical principle of active dusting explosion suppression technology, summarized and analyzed the propagation law of gas and dust explosion, then proposed that the application effect of the active dusting explosion suppression technology was mainly related to the concentration of the explosion suppression powder, the technical equipment operating time and the propagation law of gas and dust explosion. The actual application of active dusting explosion suppression technology and equipment on inhibiting gas and dust explosion propagation test was simulated in the large-scale underground test tunnel. It analyzed the explosion suppression effect of this technology on explosion flame and the shock wave pressure, verified that this technology could inhibit the gas and dust explosion propagation in the explosion's early time.