Effectively strengthening support for corporate green innovation and promoting green transformation has become the key to promoting coordinated economic and social development in China. As a demand-oriented innovation incentive policy, green public procurement is vital for promoting green innovation. Data from A-share listed firms (2013–2019) are analyzed to explore the impact of green public procurement on corporate green innovation including the heterogeneous effects under different environmental regulation intensity levels. The results show that green public procurement significantly promotes corporate green innovation, especially in areas with strong environmental regulation. Heterogeneity analyses at the firm, industry, and regional levels show that the promotion effect of green public procurement on corporate green innovation is more significant for non-state-owned, small-scale, and ISO 14001-certified enterprises; technology-intensive industries, and enterprises in eastern China and regions with high financial development levels. This study has implications for improving the effectiveness and accuracy of green public procurement policies.

切实加强对企业绿色创新的支持，推动绿色转型，已成为促进我国经济社会协调发展的关键。绿色公共采购作为以需求为导向的创新激励政策，对于推动绿色创新至关重要。分析A股上市公司（2013-2019年）的数据，探讨绿色公共采购对企业绿色创新的影响，包括不同环境监管强度水平下的异质效应。结果表明，绿色公共采购显着促进企业绿色创新，尤其是在环境监管较强的地区。企业、行业和区域层面的异质性分析表明，绿色公共采购对企业绿色创新的促进作用对于非国有、小型、通过ISO 14001认证的企业更为显着；技术密集型产业、东部地区及金融发展水平较高地区的企业。这项研究对于提高绿色公共采购政策的有效性和准确性具有重要意义。