环境规制对绿色专利产出的影响研究已成为学术研究的热点，该影响过程中存在的双重外部性问题需借助环境规制与知识产权保护合力解决，将环境规制、绿色专利与知识产权保护纳入统一分析框架，对探寻有效解决环境问题之道意义重大。本文采用2010—2021年长江经济带11省份数据，在考察环境规制对绿色专利产出的影响的基础上，进一步分析了知识产权保护的调节效应。研究发现：（1）环境规制对绿色专利产出数量的影响存在U型关系。（2）环境规制对绿色专利产出质量呈现出复杂的非线性特征，跨越U型关系的拐点后，其能够有效促进绿色专利产出质量提升。（3）知识产权保护在环境规制影响绿色专利产出数量与质量过程中均起到了显著的正向调节作用。这弥补了环境规制对绿色专利产出影响研究领域的理论研究不足，对平衡长江经济带环境保护与经济发展提供了实践启示。

The study of the impact of environmental regulations on green patent output has become a hot topic in academic research. The dual externalities in this impact process need to be addressed through the joint efforts of environmental regulations and intellectual property protection. Integrating environmental regulations，green patents，and intellectual property protection into a unified analytical framework is significant for exploring the effective solutions to environmental problems. This paper used the data from 11 provincial-level regions in the Yangtze River Economic Belt from 2010 to 2021 to examine the impact of environmental regulations on green patent output，and further analysed the moderating effect of intellectual property protection. The research found that： （1） there is a U-shaped relationship between environmental regulations and the quantity of green patent output；（2） Environmental regulations exhibit complex nonlinear characteristics on the quality of green patent output，and after crossing the inflection point of the U-shaped relationship，they can effectively improve the quality of green patent output；and （3） Intellectual property protection plays a significant positive regulatory role in the environmental regulation process affecting the quantity and quality of green patent output. This study has filled the gap in theoretical research on the impact of environmental regulations on green patent output，and will provide practical insights for balancing environmental protection and economic development in the Yangtze River Economic Belt.