Forests absorb 26% of anthropogenic CO2 emissions and store about 85% of the global terrestrial vegetation biomass carbon, thus play an important role in the global carbon cycle. Accurate estimation of forest biomass carbon storage and its changes at a regional scale is important not only for a better understanding of the global carbon cycle, but also for sustainable forest management and its contribution to national efforts to reduce greenhouse gas emissions. This presentation reports forest biomass carbon storage and its dynamics of typical forest ecosystems in Shanxi Province of North China. The study area is located in the eastern part of the loess plateau, and has the monsoon climate of warm temperate zone. Forest ecosystems studied are fragile and very sensitive to climate change. Our data sources come from national forest resource inventories, field survey data and literature review. The volume-to-biomass method (e.g. biomass expansion factor equations) was used to estimate the forest biomass carbon storage and density, and bio-climate NPP models of different forest types were used to predict the response of biomass carbon storage to climate change. The result showed that the forest biomass carbon storage increased steadily, the total forest biomass carbon storage increased from75.66•×106Mg in 1995 to 100.08×106Mg in 2005.