To investigate the population dynamics of Toona ciliata in Qizimeishan Na- ture Reserve, the age classes and population quantity of Toona clliata in Qizimeishan were analyzed by transforming diameter classes into corresponding age classes. A static life table was prepared. Moreover, the curves of survival rate, mortality rate and killing powder were drawn so as to perform spectral analysis for Toona clliata in Qizimeishan Nature Reserve. The results showed that the Vpi and Vpf of the Toona ci/iata population were 32.32% and 4.039%, respectively, indicating that Toona ci/iata is a stable growth-oriented population with high risk sensitivity. The survival rate curve was approximately fitted to the Deevey II type, so the individuals in each age class had an equivalent mortality rate in overall. The qx and Kx all reached peaks si- multaneously at 1, 4 and 6 age classes, indicating great effects of physiological properties, environmental sieves and human disturbances on Toona ci/iata population at various growth stages. The spectral analysis showed that the fundamental wave A1 was 0.752 8, while A3 showed an obvious minor cycle deviating from AI. It suggests that there is a periodicity, with minor cycles of multi-harmonic superposition, in natural regeneration of Toona ciliata population.
