Since Chongqing became the municilpality directly under central government,urban constructin has been in rapid develoopment period ,and urban heatisland effect has become a hot toopic of utban ecological issues.Based on Landsan data and vector data of five stages in 1988,1993,2000,20007and 2010,through dynamic study of barycenter transfer,surface temperature change and heat island center transfer of the constructuon land of Nanan District,this paper analyzes barycenter transfer process,land surface temperature space distribution difference and heat island center movement feature of the construction land in studied area,the research results show that,in the studied area in 22 years.construction land expansion is obvious,that its barycenter gradually transfers toward southeast direction and the transfer speed is increasing year after year,that land surface temperature space distribution and the transfer speed is increasing year after year,that land surface temperature space distribution pattern change is significant and urban heat island phenomenon is more and more remarkable,that the underlying surface in urban high temperature region mainly consists of construction land and the underlying surface of urban low temperature region is chiefly composed of waters and highly-polpulated plant coverage and that urban heat island center space change and construction land barycenter space change are highly consistent.This research result can provide policy reference for urban planning and ecological environment protenction.