Based on the theory of Harper’s (1977) modular organism population, we considered each bamboo origining the same rhizome as a module, in this paper. The small cycle of life history of Pleioblastus maculata clone population was divided to 8 stages. The dynamics of size and age structure of P. maculata clone population on Mt. Jinyun, Sichuan, were studied by leslie matrix. The results showed that the number of the clone population (in 1992) would increase gradually 8 years later and their age st...