Twig nutrient dynamics and resorption efficiency is poorly understood, compared to leaf traits.Understanding the response of twig gaits and feedback of nutrient resorption to soil nutrient supply is an important foundation to realize the trees how to adapt environment change.Chinese fir (Cunninghamia lanceolata) was chose as our object, since its twig and leaf have same lifespan and synchronously fall mainly in winter and spring.Based on the experiment with 5 replications and 6 treatments including +N1 (75 kg N ha-1 yr-1), +N2 (150 kg N ha-1 yr-1), +P (75 kg P ha-1 yr1), +N1P (75 kg N+75 kg P ha-1 yr-1), +N2P (75 kg N+150 kg P ha-1 yr-1) and CK without N and P addition, we collected primary and secondary fresh twigs in growing season and twig litters in non-growing season in the first (2012) and second (2013) years following the fertilization treatment, and analyzed the nutrient contents and resorption efficiencies.Our results showed that the fresh twig N concentration and N/P ratio were significantly different with 2012 < 2013 (P<0.05), while P concentration was not different between both years.Nitrogen, P concentrations and N/P ratio were significantly higher in the primary than the secondary fresh twig.Meanwhile, fertilization practice was generally altered N, P concentration and N/P ratio in fresh twigs.Nitrogen concentration was significantly higher with +N2P (12.99g kg-1) than with +N1 (9.91 g kg-1) in primary fresh twig of 2013, but not different among six treatments for other twig samples.Phosphorus concentration was significantly higher with +P, +N1P and +N2P than +N1 and +N2 treatments for the primary and secondary fresh twigs in 2013 and 2013, but CK was not different with all other treatments.The ratio of N/P in the fresh primary twig was higher with +N1 than with +N1P in 2012, and showed the orders as +N2> +N1> CK and +N2P> +N1P> P in 2013.Nitrogen concentrations in the primary and secondary twig litters were not significantly different among the six treatments, however, the P concentration in the primary twig litter was higher with +P, +N1P, +N2P than with +N1, +N2 and CK.Nitrogen resorption efficiency ranged from 35% to 60% in primary twig, and was higher in 2012 than in 2013, while-35% and 15% nitrogen resorption efficiency and lower value in 2012 than 2013 were found in the secondary twig.Phosphorus resorption efficiency ranged from 20% to 70%, and was higher in the primary than secondary twigs, and was higher in 2012 than in 2013.Unfortunately, N and P resorption efficiencies were not different among the six treatments.In conclusion, the effect magnitude of N addition on twig N concentration was much lower than that of P addition on twig P concentration.The coupling effect of N and P additions was mainly found on N concentration, but not P concentration in twig.We deduced that P would be key limiting factor in Chinese fir forest plantation of red soil hilly region, and twig nutrient resorption mostly depended on tree itself trait, and showed minimal influence by soil nutrient supply.Various physiological responses of different order twigs were found and need be concerned in the further research.