Abstract: This research focuses on the manufacturing industry and its sub-sectors in 11 provinces within the Yangtze River Economic Belt from 2003 to 2019.The paper utilizes the Super Efficiency SBM model to calculate the carbon emission efficiency.It comprehensively analyzes the dynamic evolution, spatial differentiation, and industry distribution characteristics.Finally, a spatial econometric model is introduced to systematically analyze the convergence characteristics of carbon emission efficiency in various regions.The research reveals the following findings: (1) The carbon emission efficiency of the manufacturing industry continued to improve, and the regional differences in carbon emission efficiency in the upper and middle reaches showed a decreasing trend, and the carbon emission efficiency of the overall Yangtze River Economic Belt and the downstream regions showed a significant polarization; (2) The carbon emission efficiency of the manufacturing industry showed a decreasing distribution of "downstream, midstream and upstream", and the distribution of carbon emission efficiency of the high-carbon manufacturing industry showed spatial heterogeneity.(3) Convergence characteristics are observed in the overall and downstream regions of the Yangtze River Economic Belt.The upstream and midstream regions show no σ-convergence but exhibit absolute β-convergence and conditional β-convergence.The impact of economic level, industrial structure, foreign direct investment level, urbanization rate, and green technological innovation on the change rate of urban carbon emission efficiency has significant heterogeneity. The main paths to enhance carbon emission efficiency in the manufacturing industry include optimizing regional collaboration and productivity layout; promoting the high-end transformation of industrial structure; improving the level of green and low-carbon technology.