Based on the sixth national forest inventory (1999-2003) and the investigation data of 1030 forest sampling plots in subtropical China collected from publications, and by using stand growth empirical equation, this paper estimated the carbon sequestration potential of forest vegetation under natural growth in Jiangxi and Zhejiang provinces in 2004-2013. In the meanwhile, the effects of three forest management measures, including interplanting, selective thinning, and fertilization, on the future forest carbon sequestration were explored by using the survey data of 455 sampling plots. In 2004-2013, the mean annual carbon sequestration potential of forest vegetation under natural growth in Jiangxi and Zhejiang could reach 11.37 and 4.34 Tg C a(-1) (1 Tg=10(12) g), respectively. Interplanting could generate the largest carbon sequestration potential of forest vegetation, followed by selective thinning, and fertilization, resulting in an increase in the potential by (6.54 +/- 3.9) Tg C a(-1), (3.81 +/- 2.02) Tg C a(-1), and (2.35 +/- 0.6) Tg C a(-1) in Jiangxi and by (2.64 +/- 1.28) Tg C a(-1), (1.42 +/- 0.69) Tg C a(-1), and (1.15 +/- 0.29) Tg C a(-1) in Zhejiang, respectively.