Abstract:     In recent years, green innovation and green transformation and development have increasingly attracted widespread attention at the practice level at home and abroad. The research on the influencing factors of enterprise green technology innovation mostly analyzes the impact on green technology innovation from the macro-industry level, mainly from the non-financial factors such as strategy, technology, market and government intervention, financial subsidies, and industrial clusters (Tao Feng et al., 2021; Shao Shuai et al., 2022). However, the impact of corporate financial system factors such as the acquisition and effective allocation of financial resources on green technology innovation is ignored. Green technology innovation is an important investment behavior of enterprises, which is different from traditional technology innovation and has unique risk and benefit characteristics. The green technology innovation activities of enterprises are inseparable from the support of continuous and large R&D funds (Brown and Petersen, 2011). How to flexibly allocate corporate financial resources to improve the level of corporate green technology innovation has become the focus of attention at the theoretical and practical levels. Financial flexibility is the embodiment and core issue of micro-enterprise financial policy choice. As an important institutional factor supporting enterprise innovation, it reflects the degree of strategic adjustment and flexibility of the company′s “change-to-change” strategy.In the context of realizing the “dual goals of carbon peaking and carbon neutrality” and “two-wheeled driving of S&T innovation and institutional innovation”, according to the data obtained at the micro-enterprise level, this paper intends to found out whether different corporate financial flexibility policies will help enterprises to carry out green technology innovation and effectively solve the dilemma of their green technology innovation, and the impact mechanism of financial flexibility policies on corporate green technology innovation.This paper selected the data of A-share listed manufacturing companies in Shanghai and Shenzhen stock exchanges from 2012 to 2021 as a sample to investigate the effect of financial flexibility policy on corporate green technology innovation. The study found that corporate financial flexibility is significantly positively correlated to corporate green technology innovation, and financial resource flexibility and financial coordination flexibility have a positive impact on corporate green technology innovation. Compared with cash flexibility and debt financing flexibility, comprehensive financial flexibility can significantly improve companies. It was further found that there is an interaction between financial flexibility and financing constraints. With the improvement of corporate financial flexibility, the negative impact of financing constraints on corporate green technology innovation will be weakened. Financial flexibility can form a partial intermediary effect on corporate green technology innovation by easing financing constraints. Financial flexibility has a “self-adaption effect”. Corporate financial flexibility can promote the acquisition of corporate competitiveness and can ensure that enterprises rationally allocate innovation resources, ensure the integrity and continuity of the value chain of corporate green technology innovation, and make corporate green technological innovation play a greater role in promoting the creation of enterprise competitiveness.The possible marginal contributions were presented in the following aspects: Firstly, this study has expanded and enriched the literature on financial flexibility policies and corporate green technology innovation, by collecting a unique corporate green technology innovation database, and verified the transformation of corporate green development and green technology progress from the micro level influencing factors. Secondly, the study is helpful for relevant researchers to understand the impact mechanism of corporate financial flexibility policy on corporate green technology innovation at the micro level. This paper turned to a more micro-level enterprise level to verify the impact mechanism of corporate financial flexibility policies to induce green technology innovation. Finally, this paper also explored the impact mechanism of the financial flexibility policy of manufacturing enterprises on enterprise green technology innovation, and the efforts will provide experiences and reference in promoting the overall green transformation and upgrading of China′s manufacturing industry. On the one hand, it will provide experience and reference for manufacturing enterprises to achieve “gorgeous transformation” in green technology innovation, and on the other hand, it will also provide suitable suggestions for capital allocation and transformation and upgrading of Chinese enterprises under the guidance of the strategic policy of “innovation-driven, green development”. 

Key words: financial flexibility, green technology innovation, resource innovation effect, coordinated innovation effect, self-adaption effect