Abstract: Because inhibitor itself has good resistance performance, during the working face tunneling, support installation, working face mining and stopping, the different inhibiting fire preventing technologies for spontaneous combustion risk prevention and treatment, curbing the occurrence of spontaneous combustion of coal development are applied. With the development of new inhibitor, the application of inhibiting fire preventing technology has been increasing. Application practices from easy spontaneous combustion mines and spontaneous combustion coal seams in Yangchangwan, Lingxin and Meihua Coal Mines of Lingwu Mining Area shows that inhibiting fire preventing technology is widely used, obvious effect technology, which can provide effective protection at early fire prevention of mine, but also can take as important early prevention measure for nitrogen injection and grouting.