The lack of prey is one of the key limitation for Amur tiger (Panthera tigris altaica) recovering. Research of population capacity is the necessary process of Amur tiger's prey restoration. Through MaxEnt model, cluster analysis, training random tree classification and other methods, combined with the survey data, the spatial distribution of suitable habitat of Amur tiger's prey in Huangnihe Forestry Bureau of south Zhangguangcai Mountain in Jilin Province was predicted, and the vegetation types were interpreted. The nutrient capacity of Amur tiger's prey was calculated based on the metabolic energy of different vegetation types, the availability of metabolic energy in different suitable habitats and the energy requirement of prey in winter. Results showed that the percentages of suitable habitat for Roe deer (Capreolus capreolus), Wild boar (Sus scrofa) and Red deer (Cervus elaphus) in Huangnihe Forestry Bureau were 52.8% (Roe deer), 40.7% (Wild boar) and 25.4% (Red deer). For the nutrient acquisition, the forest dominated by poplar (Populus davidiana), birch (Betula) and Manchurian Walnut (Juglans mandshurica) were the habitats with more energy available for red deer and roe deer, and the forest dominated by Mongolian oak (Quercus mongolica) and Manchurian Walnut were the habitats with more energy available for wild boar. The winter nutrient capacity of Amur tiger's prey population in Huangnihe Forestry Bureau was 574 red deer (0.29/km²), 7016 roe deer (3.54/km²), and 4785 wild boars (2.38/km²).