Abstract:With the further strengthening of environmental regulations in China, it is urgent to explore the impact of the integration of manufacturing and productive service industries on carbon emission efficiency from the perspective of environmental regulations. Therefore, based on the perspective of environmental regulation, using the panel data of 11 provinces and cities in the Yangtze River Economic Belt from 2000 to 2020, the super efficiency SBM model and the coupling coordination model are used to measure the regional carbon emission efficiency and the integration level of traditional manufacturing and producer services, and the mesomeric effect and regulatory effect models are used to analyze the impact of environmental regulation on the integration of two industries and carbon emission efficiency. The results show that the average carbon emission efficiency of 11 provinces and cities has decreased from 0.811 in 2000 to 0.511 in 2020, with a significant overall decrease, with Shanghai consistently leading the way in carbon emission efficiency; The growth rate of integration between the two industries is relatively fast, with the integration level in the eastern region being relatively high, which is clearly differentiated from the central and western regions; The level of integration between the two industries has a significant positive impact on carbon emission efficiency, with environmental regulation playing a partial mediating role and being an effective moderating variable. It negatively regulates the relationship between integration between the two industries and carbon emission efficiency. Based on this, it is proposed that various regions of the Yangtze River Economic Belt should promote the integration of the two industries according to local conditions, create high-end green industrial parks, and reasonably formulate environmental regulation policies.