This essay builds the evaluation index system for urban compact degree from five dimensions,such as population,economy,land use,public service and coordinate ecological environment.By the method of Grey Correlation Model,this essay measures the compact degree of eight cities of Changsha-Zhuzhou-Xiangtan urban agglomerations in 2015.The result indicates that:Firstly,the comprehensive compact degree of Changsha-Zhuzhou-Xiangtan urban agglomeration is low,and there is a large room to improve;Secondly,the economy compact degree of Changsha-Zhuzhou-Xiangtan urban agglomeration is relatively high,an...