A novel Fe-Ni-Ti composite oxide prepared via the hydrothermal method has been developed for the selective catalytic reduction of NOx with NH3. This environmentally benign catalyst showed high activity and excellent selectivity to N-2, which is supenor to that of Fe-Ti and Ni-Ti catalysts. Catalyst characterization results revealed that over Fe-Ni-Ti catalyst the dual redox cycles (Fe3+ + Ni2+ <-> Fe2+ + Ni3+, Ti4+ + Ni2+ <-> Ti3+ + Ni3+) are crucial for the enhanced activity. The synergetic effect among Fe, Ni, and Ti leads to not only the increased redox property, but also improved surface acidity DRIFT experiments demonstrated that more reactive NH3/NH4+ and M-NO2 mtro species formed over Fe-Ni-Ti catalyst, thus resulting in the efficiently catalytic removal of NOx.