The FeV/TiO2 catalyst was prepared by introducing V species to modify the iron-based catalyst, and the structures and performances were compared with the unmodified catalyst. The catalysts were characterized by means of XRD, Raman, BET, UV-Vis-NIR, NH3-TPD and H2-TPR. The results show that FeVO4 exists as the main phase in the catalyst after introducing V, and there were abundant acid sites to guarantee strong surface acidity. The strong interaction between Fe and V species also greatly enhance the redox ability. Therefore, the low-temperature activity is significantly improved and the temperature window is greatly widened. Moreover, the structure of the catalyst is hardly affected by alkali poisoning, and the catalyst could still maintain strong surface acidity after poisoning, resulting in good resistance to alkali metals.