The invention provides a silicon iron nitride-containing Al2O3-SiC-C system anhydrous tamping plug, composed of Al2O3, SiC, C, Si3N4, SiO2, Fe2O3 and other components in mass percents (m%) of 30-60%, 5-17%, 10-25%, 5-20%, 2-10%, 2-7% and 2-7%, respectively; adding 3-20m% silicon iron nitride to these raw materials, and during detecting course, silicon iron nitride is calculated in Fe2O3 form. Other components include: CaO, MgO, TiO2, K2O and NaO. Its advantages: solving the problems of slowly sintering of tamping plug and difficultly making holes, improving the property of the tamping plug; and at the same time reducing production cost.