The vegetation restoration was very slow because of water and fertilizer deficiency, which was caused by serious soil erosion on Loess hilly region. So, it was necessary to use artificial disturbance as a way to improve water and nutrient conditions and to accelerate vegetation rehabilitation. Fertilization was one of many ways that artificial disturbance was applied according to the conditions of this area. The influence of fertilization on the structure and form of Artemisia scoparia, Stipa bungeana and Artemisia sacrorum community was studied using a plot experiment in which different amounts of fertilizer were used. The results showed that: (1) Compared with CK, the important values of species in three communities changed after fertilization. In A. scoparia community, the important values of annual Setaria viridis decreased and became the companion. But the important values of perennial Heteropappus altaicus and Agropyron cristatum etc increased, and they became the main species in the community; In the S. bungeana community, the important values of S. bungeana decreased, but the important values of Lespedeza dahurica increased significantly, and they became main species in this community; The response of A. sacrorum community to fertilization was different, the important values of A. sacrorum increased little by little as the amount of fertilizer increased. Compared with CK, the even important values of companion Potentilla bifurca, Artemisia giraldii decreased in all treatment plots, but that of Lespedeza dahurica increased in the late phase. (2) In the A. sacrorum, fertilization benefits the height, biomass and density of the plant significantly. However, the density of the plants in A. sacrorum did not change when using the highest amount of fertilizer. The height and biomass of plants were the highest in the plot with high fertilizer level among the three communities, but the density was different. The highest density was in the plot with middle fertilizer level. The A. scoparia community showed the biggest change in height, biomass and density in earlier phases of succession, S. bungeana took the second place, A. sacrorum showed the least change. (3) Species diversity was changed with nutrient inputting. Different types of communities had different trends of changing. The results showed that the Patrick richness index was the highest in the plot with intermediate fertilizer level in A. scoparia and A. sacrorum community. With increasing amounts of the fertilizer, Margalef( I_Ma), Shannon-Wiener (I_SW) and evenness index decreased in degrees in these two communities, but the dominance index showed the opposite. The Patrick richness index, I_Ma, I_SW and evenness index increase in S. bungeana community, but the dominance index was opposite.