Taking the Yangtze River Economic Belt as the analysis object, an inquiry has been made into the coupling coordination degree of carbon emissions, economy, and environment in 11 provinces and cities in the region from 2008 to 2019 by using a coupling coordination degree model from the perspective of multiple coupling coordination degrees and space, followed by an analysis of the spatial correlation of the coupling coordination degree by using Moran index. The results show that all subsystems of the Yangtze River Economic Belt show a trend of fluctuating growth leading to a balance, with an overall coupling coordination degree type changing from a moderate coupling coordination to a high coupling coordination degree. From the level of various provinces and cities, the coupling coordination degree is characterized with a feature of “high in the east and low in the west, from downstream throuh middle stream to upstream”. The coupling coordination degree of the Yangtze River Economic Belt exhibits a significant spatial agglomeration, mainly manifested as a high-high aggregation in the downstream of Jiangsu, Zhejiang and Shanghai as well as a low-low aggregation in the upstream. In order to enhance the high-level coordinated development of the region, breakthroughs can be made so as to realize an optimization of the industrial structure and a promotion of the in-depth cooperation in the future.