The fine roots of different orders have morphological, structural and physiological differences. The study of fine root physiological ecology based on root order is an important part of current ecological research. Research on different root-order fine roots of different life-type trees can provide a theoretical basis for the underground fine root nutrient strategy of forest ecosystem. The results of this study showed that: (1) Except for the P content and N:P of deciduous trees, the content of C, N and P as well as their stoichiometric ratios in the fine roots of evergreen and deciduous species were significantly different in different root orders (P<0.05). The content of C, C:N, and C:P in fine roots increased with the increase of root order, while the content of N and P decreased with the increase of root order. (2) The content of C had the lowest coefficient of variation in the C, N, and P nutrient contents of evergreen and deciduous trees, and the coefficient of variation of N and P content in fine roots of two life-type trees increased with the increase of root order. (3) The N and P contents of fine roots of evergreen tree species were significantly lower than those of deciduous trees, but C:N and C:P were significantly higher than those of deciduous trees. The content of C and N:P were not significantly different between the evergreen and deciduous trees. (4) The allometric relationship of the fine root nutrient (C, N and P) of evergreen and deciduous trees had a common slope between different orders. The relationship of N and P in the fine roots of evergreen tree species was isometric, but the fine roots of deciduous tree species had an allometric growth relationship with the growth rate of P content greater than that of N(exponent: α>1). In conclusions, with the increase of root order, the fine roots of evergreen and deciduous trees had similar change strategies of nutrient. The N and P nutrient contents had less variability in low-order fine roots. The fine root growth of deciduous trees was more affected by P deficiency than that of evergreen species. The higher N, P content and lower C:N and C:P of deciduous tree species than that of the evergreen tree species as well as the allometric growth of N and P nutrients of the fine roots of evergreen and deciduous trees indicated that the fine roots of deciduous trees were more likely to adopt rapid resource acquisition strategies.