Abstract: The effect of introducing carbon tax on the coordinated development of national and regional economy was explored by applying the quantile regression approach for the purpose of maximizing its positive impact. The results indicated that: as to China in the whole， introducing carbon tax has a significantly negative effect on promoting the level of coordinated development of regional economy， but enhancing human capital scale and reinforcing regional trading could alleviate the negative effect; as to the four regions， introducing carbon tax has a significantly negative effect on promoting the level of coordinated development of regional economy in the eastern and northeastern regions， and the negative effect in the northeastern region is much more serious， whereas introducing carbon tax shows a positive effect in the central and western regions. Finally， some relevant policies and suggestions like carrying out periodical and differentiated carbon tax were proposed based on the results.

Key words: carbon tax, regional economy, quantile regression