Litter decomposition is an important link between bioelement cycles and energy flow in the forest ecosystems, and the main source of nutrients for plants and soil. The relationships were studied between leaf litter stoichiometric traits dynamic and decomposition rate under different forest types using litter bag method in this paper to quantify the effects of stoichiometric traits dynamic on leaf litter decomposition and to get a better understanding to the biochemistry of litter-soil continuum. The results were showed as follows: the sequence of litter decomposition rate for the three forest types was Pinus massoniana stand (PM)< Quercus variabilis stand (QV)< P. massoniana-Q.variabilis mixed stand (PQ) and the litter decomposition rate was more and more significant with time. The remaining dry mass of litter in PM, QV and PQ were 67.59%, 64.75% and 62.13%, respectively after 450 d decomposition. The predicated period of litter decomposition 50% and 95% for PM, QV and PQ was 2.11 a and 9.15 a, 1.93 a and 8.45 a, as well as 1.76 a and 7.77 a, respectively. In these forest types, the concentration of C and P in decomposing litter decreased while N concentration increased with not significant. Leaf litter element dynamic was significantly different. The sequence of the initial C concentration was PQ< QV P<0.01), negatively with C concentration (P<0.01), C/N ratio (P<0.01), and negative quadratic function with N/P ratio (P<0.01). P concentration was different in three stands, and negatively linearly related to the decomposition rate for QV (P<0.01) and PM (P < 0.05), and negative quadratic related for PQ (P < 0.05). The decomposition rate and leaf litter stoichiometry was different among the three stands. The dynamic of C, C/N ratio and N/P ratio in the three stands were similar showing a significant positive correlation with N concentration. The possible reason for this may be that the plants in high latitudes are more susceptible to N restrictions, while those in low latitudes are more susceptible to P restrictions. Whether the plant is limited by N or P, the stoichiometry for different plants is influenced by different environmental factors. This study indicated that the nutrient dynamic during the decomposition of litter leaf under different forest types tend to help itself decompose. The concentration dynamic for N and P was the major factors in regulating carbon balance of ecosystem and litter decomposition, nutrient transfer in mixed litter is the reason for decomposition acceleration.