Abstract: Nitrogen injection for fire control is a main method to prevent spontaneous combustion in goaf and inert burning area. In the process of traditional buried tube nitrogen injection, the nitrogen injection spots have intervals in the space, which causes the failure of forming a continuous distribution of nitrogen in goaf, and leads to poor inert effect and large amount of nitrogen injection, in addition, the un-recycling of the nitrogen injection pipe causes the great resources waste. Based on the principle that the shear capacity of the mining nitrogen injection pipe is superior to its tensile strength, new fire control nitrogen injection process with rotating traction and non-interval is specially designed, which makes the nitrogen injection point and the workface keep synchronous movement, fundamentally solves significant defects of traditional buried tube nitrogen injection, which can realize the continuity distribution of nitrogen in goaf and the recycling of the nitrogen injection pipe. Taking 8104 workface in Tashan Mine for an example, numerical simulation of inert effcet is analyzed for non-interval nitrogen injection and traditional buried tube nitrogen injection. The result is that non-interval nitrogen injecttion can effectively decrease the width of oxidation zone in goaf, which can make obvious inert effcet. According to the unloading arch principle and the dynamic calculation of trenchless pipe directional crossing technology, the traction power of non-interval drag pipe nitrogen injection for fire control can be calculated and analyzed.