Abstract: Since the 19th National Congress of the Communist Party of China, the "Two Mountains Theory" has received unprecedented attention from the Party Central Committee and governments at all levels. The report of the 19th National Congress of the Communist Party of China further proposed to build a market-oriented green technology innovation system. In the new development stage, how to drive the green economic transformation and the high-quality development of micro enterprises has become the only way to realize ecological civilization and build a powerful country with scientific and technological innovation. Enterprise green technology innovation conforms to the new development concept of innovation and green. How to drive enterprise green technology innovation has become a hot research topic in academic circles. The existing research shows a great degree of neglect of executive sustainable oriented and strategy driven green innovation decision-making from the perspective of strategic decision-making. Based on the research sample of A-share listed companies in Shanghai and Shenzhen from 2007 to 2017, this paper empirically analyzes the impact of CEO public environmental protection experience diversity on enterprise green technology innovation and its internal impact mechanism. On the one hand, expand the research sample of green technology innovation, build a large sample of enterprise green technology innovation based on the perspective of enterprise green patents, comprehensively investigate the impact of CEO's diversity of public environmental protection experience on enterprise green technology innovation from the perspective of senior executives' strategic decision-making, and enrich the bias of existing research on enterprise green innovation measurement or the drawbacks of too narrow sample. On the other hand, it enriches the antecedents of enterprise green technology innovation from the perspective of strategic decision-making, constructs the theoretical logic transmission framework of "senior executives' sustainable orientation - corporate social responsibility - enterprise green technology innovation", and further enriches the traditional research on the driving effect of external institutional legitimacy pressure on enterprise green technology innovation from the perspective of organizational institutionalism. The research finds that: (1) CEO's diversity of public environmental protection experience has a significant driving effect on corporate green technology innovation; (2) The results of the transmission mechanism test show that corporate social responsibility and environmental protection investment have a partial intermediary effect between the diversity of CEO's public environmental protection experience and corporate green technology innovation; (3) The results of the regulation effect test show that the restrictive government regulation and the incentive government regulation in the external environmental regulation produce the substitution effect and the synergistic complementary effect respectively between the diversity of CEO's public environmental protection experience and the enterprise's green technology innovation; (4) The results of heterogeneity analysis show that the diversity of CEO's public environmental protection experience has more obvious driving effect on green technology innovation of technology intensive enterprises, large-scale enterprises and non-state-owned enterprises. The policy and management implications of the study mainly focus on two levels. First, for enterprises, they attach great importance to the strategic value of green transformation and green innovation in the new development stage. In this process, they need to effectively promote the transformation of traditional innovation system to green technology innovation system with sustainable strategic orientation from the strategic decision-making level of senior executives, optimize the construction of enterprise green innovation management system, and give better play to the strategic decision-making value of strategic decision-makers under the principal-agent problem. Secondly, the sustainable orientation of enterprises is an important cognitive basis for the transformation of the enterprise innovation system to a green oriented sustainable innovation system. Under the background of the unprecedented strengthening of green development oriented regulation in the current external institutional environment, enterprises need to pay more attention to the concept of green environmental value creation for stakeholders. Second, for the government, the external system can better play the role of regulation, guidance and governance of enterprise green technology innovation. For the negative environmental problems arising from the negative corporate social responsibility practices or the production and operation of enterprises, it is necessary to strengthen the construction of the negative list system of environmental regulation, give play to the binding effect of external formal systems and regulations, and rely more on the government environmental subsidies under industrial policies for the positive behavior of enterprises to carry out green innovation to generate environmental value, the construction of sustainable incentive mechanism for green technology innovation of enterprises is realized by policy incentives under the government.

Key words: CEO's public environmental protection experience, diversity, corporate social responsibility, enterprise green technology innovation