Abstract: For achieving the national "Dual Carbon" target, urban emission reduction is imminent. In this study, a spatial land-carbon framework was proposed. Taking the land use type migration in Xuzhou city from 2000-2010 and from 2010-2020 as example, The Ecological Network Analysis (ENA) was used to evaluate the positive and negative transfer of land-related carbon emissions and the changes of Ecological relationships. The land-carbon correlation rate was proposed to evaluate the comprehensive impact of land use changes on carbon balance in Xuzhou city. The interspecific ecological network between land use type conversion and carbon transfer was discussed based on the interspecific mechanism of ecology. The results show that:(1) the main positive carbon transfer was from cultivated land to industrial and transportation construction land, and the main negative carbon transfer was from industrial and transportation construction land to urban built up area. (2) In terms of time, carbon transfer intensity increased and the transfer type became more complex. In terms of space, the mutually beneficial relationship of land is distributed in subordinate districts and counties, while the competition relationship is distributed in central urban areas. (3) The contribution rate of carbon transfer thrust is mainly from farmland and the contribution rate of carbon transfer pull is mainly from industrial and transportation land. The land-carbon framework quantifies the land-related carbon transfer and obtains the ecological relationship between different land use types, which provides a new perspective for the spatial planning of carbon emissions.

Key words: land-carbon framework, ecological network analysis, land use change, carbon transfer, Xuzhou