This study investigates the function and contribution of the cultural industries’ agglomeration to green economic growth. Based on the quasi-natural experiment of the “provincial cultural industry park” selection policy, we use the panel data of 279 prefecture-level cities from 2004 to 2019, and the multi-period difference-in-differences method, to empirically test the impact of cultural industry parks on green economic growth. The basic results support that urban GTFP increases by about 1.5% on average after constructing a provincial cultural industry park. The regional heterogeneity test revealed that the green economic growth effect is more robust in the eastern and human geography regions of northeast cities. Further research on the influencing mechanisms found that the regional economic development level and economic openness, cultural education level, upgrade industry structure, and digital technology development level support the driving effect of cultural industry parks on the development of the green economy. The research in this article gives empirical support to the driving effect of cultural industry parks on regional green economic growth. It proposes that various regions strengthen financial support, improve cultural and educational levels, and develop digital technology to promote green economic growth.

With the continuous changes in the external environment, and the prevalence of protectionism and unilateralism in some countries, the theoretical environment of “dual circulation” has changed dramatically, and China’s national economy has been severely impacted by the new crown epidemic. Thus, developing the national economy and activating the vitality of the sustainable development of the cultural industry is key. This paper constructs a hypothetical model of the key factors of the supply-side structural reform of the sustainable development of Jiangsu’s cultural industry under the dominance of domestic internal circulation, and then designs a questionnaire according to the hypothetical model and conducts a questionnaire survey. Data and hypothetical models are investigated, reliability and validity testing are conducted, and structural equation modeling analysis is carried out. The research results show that: product satisfaction factor, consumer price rationality factor, consumption channel diversity factor, consumption promotion effectiveness factor, and consumption security factor all have a positive impact on consumer satisfaction factor, and the supply-side structural reform impetus has a significant positive impact on consumer satisfaction, and consumer satisfaction has a positive impact on consumer expectations. Finally, suggestions are put forward for the supply-side structural reform of Jiangsu’s cultural industry, in order to promote the sustainable development of the cultural industry.