Abstract: Constructing the non-competitive input-output schedule, using the improved polar decomposition method, analyzing effects of China's carbon emissions from the perspective of the final demand, The results show that: (1) During1992-2012 years, China's carbon emissions increase6.619 billion tons, of which scale effect and structure effect induce 7.368, 4.746 billion tons respectively, and technical effects reduce 5.187 billion tons of carbon emissions. (2) Among the "three carriages", consumption incurring carbon is mainly concentrated in agriculture and service industry, with the scale effect being the primary driven force. (3)Investment and export concentrates in the industrial industry, the scale and the intermediate structure effect being the main effect, which reflects t process of industrialization, economic globalization profound influence on China's carbon emissions.

Key words: Three carriages, carbon emissions, polar decomposition method