Abstract: For both intensive managed (IM) and extensive managed (EM) Phyllostachys pubescens forests, the dynamics of carbon accumulation in one-year-old bamboos and carbon storage (CS) in P. pubescens stands were estimated by means of biological measurement method. The results showed that carbon accumulation amounts (CAA) in one-year-old P. pubescens increased rapidly over time up to six months after the P. pubescens shoots spouted and then increased slowly. The CAA in one-year-old P. pubescens under IM and EM were 10.11 and 5.61 t/hm²,respectively, during six months. The greatest CS in different organs was observed in the trunks of one-year-old bamboo, and it accounted for 71.6%-78.0% of total CS. The CS of forest litter under IM and EM were 1.173 and 2.156 t/(hm²·a). The decomposition rate of forest litter under EM was greater than that under IM. The CAA in the P. pubescens stands under IM was 12.750 t/(hm²·a), which was 1.56 times of that under EM. Because of its very high growth rate and great annual CAA, P. pubescens forests may be one of the best forest vegetation for carbon fixation.