The important basis for effectively making carbon abatement measures is to scientifically understand the affecting factors of city carbon emissions and its existed response. The correlation coefficient method to quantitatively measure the relationship between Changsha carbon emissions and its influence factors, as well as the ridge regression to analyze the quantitative change of Changsha carbon emissions and their influence factors are respectively used. The results shows that the influencing factors of Changsha carbon emissions by its explaining ability model are as follows, such as total population (0.750 4), energy intensity per GDP (0.371 9), urbanization rate (0.272 0) and urban residents per capita consumption expenditure (0.145 2) with the background of rapid urbanization.