Abstract: Sintering flue gas produced by iron and steel enterprises has the characteristics of low temperature and multi-pollutant emission. Activated carbon (AC) is the carbonaceous sorbing material having a porous structure and considerable specific surface area. Ni/AC has better characteristics of low-temperature desulfurization. To research the usability of a desulfurizer for low-temperature desulfurization of iron-steel sintering flue gas, coconut husk AC was taken as the object of our research. Coconut husk AC is modified using nitric acid and loaded using nickel. By simulating sintering flue gas, we analyzed the desulfurization influence factors of reaction temperature and modifying conditions by conducting a desulfurization experiment. The surface properties of AC and the desulfurizer were studied via SEM, BET, XRD, and FTIR. The results of the desulfurization test were as follows:the Ni optimum load quantity is 1%, the optimum reaction temperature for 1Ni/NAC desulphurization is 60℃, and the desulfurizing properties of 1Ni/NAC have been raised. Through characterization of the structure and compose of AC, NAC, Ni/AC, and 1Ni/NAC, the acid modification AC still has a considerably porous structure, its specific surface area, micropore volume, and total volume markedly increased, and the nitric acid can remove the impurity and increase the acidity oxygen-containing functional groups. These research findings can aid in low-temperature desulfurization and the simultaneous control of multiple pollutants for iron-steel sintering flue gas by making use of modified AC.