| Science and technology industry has become a top priority.As China’s economy has entered a period of high-quality development,it is urgent to speed up the adjustment of industrial structure and develop high-tech industry.Enterprises are an important part of scientific and technological innovation,and their R & D ability is closely related to the comprehensive strength of the country.Since the development of enterprises mainly depends on the external market,changes in the market environment,unpredictable risks in innovation,and uneven distribution of market resources to innovative enterprises all make the external environment of enterprise innovation in an unstable and unbalanced state.Therefore,starting from the internal environment of the enterprise,it is urgent to improve the independent innovation ability of the enterprise itself.Tax preference is an important means of national macro-control.It can effectively stimulate the innovation ability of enterprises,so as to promote the R & D and innovation of enterprises.The scope of application of the preferential tax policy of enterprise income tax is relatively wide,the preferential ways are relatively diverse,and the impact on the innovation behavior of enterprises is relatively direct.Therefore,the discussion on its influencing factors and influencing factors is of great significance to improve the innovation ability of Chinese enterprises.This thesis mainly applies two research methods,comparative analysis and empirical analysis,to study the preferential policies of enterprise income tax to stimulate enterprise technological innovation in China.The research idea is introduction-theoretical analysis-current situation analysis-Empirical Analysis-policy suggestions.Firstly,it studies the influence mechanism of China’s enterprise income tax preferential policies on China’s enterprise R & D innovation;Then,it combs and analyzes China’s technological innovation and preferential tax policies.Analyze the current situation of technological innovation in China from the current situation of R & D investment and R & D output,and then sort out the preferential income tax policies in China.Finally,we get the characteristics of preferential tax policies for innovation incentive enterprises;On this basis,using the data of 225 GEM listed companies from 2011 to 2020 to measure the innovation incentive effect of preferential corporate income tax policies,the study found that:(1)It is found that there is an obvious negative correlation between the actual income tax rate and the R & D investment intensity of Chinese enterprises;(2)There is a regional imbalance between the preferential policies of enterprise income tax and innovation incentives;(3)There are industry differences in enterprise income tax preference,and the incentive effect of tax preference policies on manufacturing industry is more obvious;(4)The larger the enterprise scale,the lower the R &D investment intensity;The profit level of the company,that is,the return on net assets,is negatively correlated with the innovation of research and development;Improving the company’s solvency can reduce the increase of R & D investment intensity.Finally,on the basis of empirical research,this thesis discusses the preferential tax system of China’s enterprise income tax at the legislative level,optimizes the preferential policy structure of enterprise income tax,strengthens the incentive to the central and western regions,strengthens the incentive to the service industry,strengthens the incentive to small,medium-sized and micro enterprises,and moderately relaxes the policy suggestions on preferential tax policies. |