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自改革开放以后，中国经济进入高速发展阶段，随着经济发展和人民对精神生活的追求，绿色生活、绿色消费的愿望逐渐强烈，而在经济高速增长背后，资源约束收紧与生态红线触底等问题已成为中国经济高质量发展的桎梏。党的二十大做出重大决策部署，推动绿色发展，促进人与自然和谐共生，在高质量发展的背景下，绿色发展成为政府部门和学术界关注的焦点。随着新型城镇化进程的加快，“产城融合”逐渐成为中国城市化进程中的战略选择，产城融合不断推进可以促进城市和产业协同发展，提升城市和产业竞争力，实现城市转型升级和可持续发展。因此，深入研究产城融合对城市绿色发展的影响和机制对于地区经济绿色高质量发展具有重要意义。

本文聚焦于我国产城融合赋能城市绿色发展的影响和机制研究，立足于经济高质量发展的大背景和现有研究的不足，在以下三个方面进行阐述：首先，本文从产业匹配、人口红利、消费需求、生态环境和基础设施五个分点视角出发，将产业发展、城市功能和人本导向三个主点纳入到产城融合指标体系中，探讨产城融合赋能城市绿色发展的理论影响，分析产城融合对城市绿色发展的机制路径；其次，本文基于2010～2020年中国一二三线119个地级市的面板数据，综合运用固定效应和GMM模型、空间溢出效应模型、中介效应模型、双重差分法和工具变量法等多种分析工具来研究产城融合对城市绿色发展的影响，并对其影响机制进行检验；第三，本文采用空间计量模型研究产城融合对邻近地区绿色发展的影响作用进行分析。本文旨在根据地区差异性和优势制定特殊发展政策和发展模式，为地区产城融合、生态环境改善以及经济绿色高质量发展提供决策依据和参考。

全文以中国一二三线地级市为研究对象，从理论和实证层面系统分析产城融合与城市绿色发展之间的关系，沿“文献分析——理论论述——现状分析——实证研究——结论对策”的思路展开。根据上述思路，所得主要结论如下：第一，我国一二三线城市产城融合水平在空间上存在明显的区域差异性，并呈现出点状辐射状，整体城市产城融合水平差异在逐年缩小，不同等级城市内部和外部差异也在缩小。第二，产城融合能够显著地促进城市绿色发展水平，并随着城市绿色水平的提高，产城融合对城市绿色发展的促进作用会更强。第三，环境规制、劳动配置效率和资本配置效率均在产城融合对城市绿色发展的影响中显著地起到中介作用，并且“先产后城”路径无法推动地区产城融合发展，“先城后产”路经可以推动地区产城融合发展，显著说明形成“先城后产-产城融合-绿色发展”的正向的路径最符合地区绿色发展的促进要求。第四，产城融合对绿色发展在短期内会促进该地区绿色发展，但会抑制邻近地区绿色发展，但在长期中会促进本地区和邻近地区绿色发展，并且其短期总效应小于长期总效应。第五，以产城融合示范区为准自然实验，并且以地形起伏度的倒数与国际互联网用户数取对数的交互项作为工具变量，两种方法均验证产城融合可以促进城市绿色发展。

Since the reform and opening up, China's economy has entered a stage of rapid development. With the economic development and people's pursuit of spiritual life, the desire for green life and green consumption has gradually become strong. Behind the rapid economic growth, the tightening of resource constraints and the bottom of the ecological red line have become the shackles of China's high-quality economic development. The Party's 20th National Congress made major decisions and deployments to promote green development and promote harmonious coexistence between man and nature. In the context of high-quality development, green development has become the focus of attention of government departments and academia. With the acceleration of the new urbanization process, "industry-city integration" has gradually become a strategic choice in China's urbanization process. The continuous promotion of industry-city integration can promote the coordinated development of cities and industries, enhance the competitiveness of cities and industries, and achieve urban transformation and upgrading and sustainable development. Therefore, it is of great significance to study the influence and mechanism of the integration of industry and city on the green development of city for the green and high-quality development of regional economy.

This paper focuses on the research on the influence and mechanism of urban green development enabled by domestic urban integration. Based on the background of high-quality economic development and the shortcomings of existing research, it expounds in the following three aspects: First of all, from the perspective of five points: industrial matching, demographic dividend, consumer demand, ecological environment and infrastructure, this paper includes three main points: industrial development, urban function and people-oriented orientation into the index system of industry-city integration, discusses the theoretical impact of industry-city integration on enabling urban green development, and analyzes the mechanism path of industry-city integration on urban green development. Secondly, based on the panel data of 119 prefecture-level cities in China's first, second and third tiers from 2010 to 2020, this paper comprehensively uses a variety of analytical tools, such as fixed effect and GMM model, spatial spilover effect model, intermediary effect model, differential method and instrumental variable method, to study the impact of industry-city integration on urban green development, and to test its impact mechanism. Thirdly, this paper uses the spatial econometric model to study the impact of the integration of industry and city on the green development of neighboring areas. This paper aims to formulate special development policies and development models according to regional differences and advantages, and provide decision-making basis and reference for regional integration of industry and city, improvement of ecological environment and green and high-quality economic development.

This paper takes China's first, second and third-tier prefecture-level cities as the research object, systematically analyzes the relationship between industry-city integration and urban green development from the theoretical and empirical levels, and proceeds along the train of thought of "literature analysis -- theoretical discussion -- current situation analysis -- empirical research -- conclusion and countermeasures". According to the above ideas, the main conclusions are as follows: First, there are obvious regional differences in the integration level of industry and city in China's first, second and third-tier cities in space, and the differences in the integration level of industry and city in the overall city are narrowing year by year, and the internal and external differences in different grades of cities are also narrowing. Second, the integration of industry and city can significantly promote the level of urban green development, and with the improvement of urban green level, the integration of industry and city will play a stronger role in promoting urban green development. Third, environmental regulation, labor allocation efficiency and capital allocation efficiency all play a significant mediating role in the impact of industry-city integration on urban green development. In addition, the "pre-post-birth city" approach cannot promote the integrated development of regional industry-city, while the "pre-city and post-production" approach can promote the integrated development of regional industry-city. It is obvious that the positive path of forming "city before industry - industry and city integration - green development" is in line with the promotion requirements of regional green development. Fourth, the integration of industry and city will promote the green development of the region in the short term, but will inhibit the green development of neighboring areas, but will promote the green development of the region and neighboring areas in the long term, and its short-term total effect is smaller than the long-term total effect. Fifth, taking the industrial integration demonstration area as the natural experiment, and taking the reciprocal of topographic relief and the interaction term of logarithm of the number of Internet users as the tool variable, both methods verify that industrial integration can promote urban green development.