Abstract: Forestry ecological construction has characteristics of long time production cycle, heavy investment and low efficiency of carbon sink benefits, so the authors discussed the development obstacles of forestry carbon sink projects according to capital, technology, institution and patterns under the background of the voluntary emission reduction trading system of greenhouse gas of China. Simultaneously, the authors proposed the suggestions including of broadening investment and financing channels, expanding the project methodology, exploring the pre-sale system of emissions reduction, and improving the anti-risk ability of project owners from the actual situation. The aim was to provide a reference for promoting the growth of forestry carbon sink project.