Carbon flow of harvested wood products (HWP) plays a very important role to maintain the natural carbon balance between forest and atmosphere. To facilitate China's participation in the climate change negotiation,it is important to understand the carbon flows and the changes of HWP in the countries involved. Through the Intergovernmental Panel on Climate Change (IPCC) default approach,the stock change approach,the production approach, and the atmospheric flow approach,this paper analyzed the data on carbon emission and stock of HWP in eleven countries including China,and the influence of different conversion factors on carbon stock change. The results showed that carbon emission and stock of HWP in the United States, China, Brazil and Canada were higher than those in other countries. The wood products in China were a carbon pool. Different approaches would lead to different results. Both the stock change approach and production approach indicated that HWP in Japan was a carbon pool,however,the atmospheric flow approach indicated the opposite conclusion. Different conversion factors would affect the measure results of carbon stock change.