Abstract:As a major human social and economic activity,the expansion of construction land can significantly affect the total amount of carbon emissions.Based on the data of land use and energy consumption in Wuhan from 1997 to 2017,this paper analyzed the relationship between urban CO2 emissions and economic growth by applying the environmental Kuznets curve hypothesis.This study is to investigate how urban CO2 emission intensity has changed with the growth of construction land.The results demonstrate:1) The period 1997 to 2017 saw an increased volatility in total carbon emission of which the carbon emissions of construction land were the main source accounting for more than 99% of the total.2) An inverted U shape relationship between urban CO2 emission intensity and urban construction land was captured.3) Among the secondary class of construction site,an inverted U shape relationship was observed with regard to the transport and residential & industry sectors while in water sector no obvious relationship was observed.Therefore it is proposed that quotas of construction land should be prioritized in favor of low-carbon emission industrial land use.Meanwhile,efforts should be made to convert various land into green area with carbon sink function such as grassland and woodland.