Abstract: Abstract: According to the basic theory of decoupling and recoupling, this paper analyzed the "decoupling" and "recoupling" change trajectory between china’s transportation carbon emissions and traffic economy growth during the period of 1995-2012. Further, this paper analyzed the driving factors by decomposing the transportation carbon emissions with LMDI method, exploring the responsive relations and deep-seated reasons between china’s transportation carbon emissions and traffic economy growth. Results show that the overall decoupling effect is not strong, with "weak decoupling" and "expansionary recoupling".Among all the driving factors, the effect of traffic economy development is the largest, much greater than that of transportation energy efficiency and emission reduction technology.