[Objective] Under the goal of "double carbon", it is of great significance to study the impact of land use on carbon emission, carbon absorption and carbon balance, and to carry out territorial spatial planning on this basis. [Methods] In view of this, this paper takes the CCEZ as the study area, based on the land use and socio-economic data, and adopts the coefficient method to measure the carbon balance of the study area from 2000 to 2022 and explore the differences in its spatial and temporal patterns, and then conducts carbon balance zoning of the processed results from multiple perspectives by means of the economic contribution rate and ecological carrying capacity coefficient and puts forward a targeted strategy. [Results] ① Carbon emissions generally show an upward trend, and cropland and construction land are the most important sources of carbon, which are spatially distributed mainly in the Chengdu Plain area as well as the Chongqing metropolitan area in the study area. ② The total amount of carbon sequestration showed an upward trend, and the main source of carbon sinks was forest land, which was spatially distributed mainly in the mountainous areas around the study area. ③ Total net carbon emissions increased by 273%. The number of counties achieving carbon balance was reduced from 23 to 10. ④Based on carbon balance analysis, areas such as high-quality agricultural production areas are classified as low-carbon development zones, densely populated and narrowly developed core areas are classified as carbon-intensity control zones, traditional industrial areas are classified as high-carbon optimization zones, and ecological barrier zones are classified as carbon sink functional zones based on the indicators of net carbon emissions and economic contribution rate, among others. [Conclusion] The spatial and temporal differences in carbon emissions in the CCEZ have corresponding regularities, and the carbon absorption space is more stable, so the land resource utilization structure can be further adjusted in a more refined way according to the land zoning optimization plan, so as to promote the low-carbon development and sustainable development of the economic zone.