Abstract: Based on the data of 34 low carbon pilot cities in China, this paper builds up City carbon emission-New pattern urbanization system evaluation models. Mathematical and statistical analysis software of Matlab7.0 and SPSS18.0 are applied to calculate the index weights through principal component analysis and entropy evaluation methods and then get the comprehensive evaluation index of City carbon emission-New pattern urbanization system of which coordination degree model and coordination development degree model are investigated. Research result reveals that there are 4 basic consequences:first, the overall level of the coupling coordination degree of City carbon emission-New pattern urbanization system is not high; second, the system shows strong relationship between coordination degree and coordination development degree on the geographical regional type; third, the coordination degree and coordination development degree in general have a strong positive correlation; finally, the corresponding relation between the comprehensive evaluation degree, coordination degree, coordination development degree and the regional economic development level is intensively strong, on the contrary the relation is not significantly obvious between the comprehensive evaluation degree, coordination degree, coordination development degree and the city carbon emission level.