The soil organic carbon(SOC) and microbial biomass carbon(MBC) content of intensive management Moso bamboo(Phyllostachy edulis) plantation in Huitong forest region,Hu'nan Province were analyzed in this paper.The results showed that the Moso bamboo plantation(0-60 cm layer)soil organic carbon and microbial biomass carbon content averaged were 1.727% and 551.84 mg/kg,respectively.There were very significant differences in different soil layer of soil organic carbon(SOC) and microbial biomass carbon.The soil organic carbon content in 0-20 cm layer were 2.607%,which is 1.67 times and 2.57 times than that in 20-40 cm and 40-60 cm layer,respectively.The microbial biomass carbon content in 0-20 cm layer account for 58.9% of the total microbial biomass carbon,which is 2.69 times and 3.08 times than that in 20-40 cm and 40-60 cm layer,respectively.There were not significant differences in different season of soil organic carbon,however,there were very significant differences of microbial biomass carbon.The microbial biomass carbon content showed an increasing tendency from January to July and showed the downtrend from August to December.Soil microbial quotient in Moso bamboo plantation was 1.118 6%,as same as 40-60 cm soil layer,slightly higher than the 20-40 cm soil layer.That is to say,different Moso bamboo soil layer had similar abilities to accumulated soil organic carbon.