Abstract: In order to provide precise and reliable data to evaluate carbon sink capacity and dynamic trend of forests in China, the variable BEF (Biomass Expansion Factor) method was used to estimate and analyze the storage, density and dynamics of forests carbon in Guangdong province based on the continuous forest inventory data from 1988 to 2007. The results showed that, the total carbon storage of forests in Guangdong province increased continuously form 15 297.51×104 t to 21 555.19×104 t, the annual growth rate was 1.79 % with the increment 329.35×104 t, indicating that forests in Guangdong province had a great contribution for carbon sequestration. Broadleaf forest was the main contributor which accounted for 68.95 % of total carbon storage, the carbon density of forests in Guangdong province showed an increasing trend with the annual growth rate 0.80 %, eucalyptus and hardwoods were the fastest growth species. The area and carbon storage of the middleaged and young forest accounted for more than 80 % of the total forests, indicating that Guangdong had great potential capacity for carbon sequestration.