Abstract: Ecological space is an important ecological barrier to ensure the harmonious coexistence of human society and natural environment, and plays an important ecological function. The change and reconstruction of urban agglomeration ecological space is an inevitable requirement of ecological civilization construction, and also a scientific problem to be solved in geography, ecology, urban and rural planning and other disciplines. By using ArcGIS and other software to process the data, the spatial attribute database was established, the transfer matrix of ecological spatial land in Changsha Zhuzhou Xiangtan Urban agglomeration was constructed, and the main flow direction of ecological land was quantitatively analyzed. The results show that: from 1980 to 2017, a total of 4 980.54 hectares were reduced, with an average annual reduction of 184.46 hectares. The period from 2000 to 2017 is a period of rapid decrease, with an average annual decrease of 8 times that of the past 20 years and a dynamic degree of -0.517 4%. The maximum area of forest land transferred out was 26.22 hectare, and the area of cultivated land transferred out was 22.08 hectare, accounting for 52.65% and 44.33% of the total transferred out area respectively. The maximum area of forest land transferred out is 26.22 hectare, and the area of cultivated land transferred out is 22.08 hectare; They accounted for 52.65% and 44.33% of the total transferred out area respectively. From three aspects of ecological water network system, ecological patch system and ecological matrix system, this paper puts forward the reconstruction strategy of green core ecological space in Changsha Zhuzhou Xiangtan Urban Agglomeration.