| Innovation is the impetus for the sustained and coordinated development of social economy. As economic statistics showed, although the intensity of R&D input of enterprise in China is still rising, there is still a big gap with the developed countries. There are few enterprises with the core technology of independent intellectual property right, and many technologies borrow from abroad. These show that the technological innovation ability of our enterprises are weak. Enterprise technological innovation is not only influenced by its own economic, but also will be affected by market failure which leaded by the technological innovation itself. Therefore, it is necessary for the government to stimulate innovation and to provide a good policy environment. Tax incentive policy is adopted by a lot of countries, because it can enjoy by most enterprises. Our country also use tax incentive policy to support innovation. Therefore, we need to evaluate the effect of tax incentive policy, discuss its mechanism and the possible impact. Then, we can provide some advice to the policy department.Firstly, we read relevant literature for reviewing researches on the tax incentive policy to enterprise technological innovation. Secondly, we definite the concept of technological innovation and tax incentive, then using asset cost model to analyze of how tax incentive affects the enterprise technological innovation behavior. From the four aspects of the investment input, the human resource input, the patent output and the new product sales revenue, we analyze the technological innovation ability and the level of our country enterprise. On this basis, we analyze the problem of tax incentive policy related to technological innovation of enterprises from macro level and micro level. There are such problems on macro level as lacking of macro coordination on tax incentive policy, unbalanced tax burden in different regions, lacking tax incentive policy for environmental protection and unreasonable tax form. There are such problems on micro level as the tax incentive policy is not matching the technological innovation activity and the tax incentive policy management is low.The fifth part of this paper is the empirical part. Three VAR models are used for the three stages of enterprise technological innovation activities. During the research and development stage, the relationship between the intensity of R&D investment and the corporate income tax burden, the turnover tax burden and the financial science and technology appropriation intensity is established. During the transformation stage, the relationship between the commercial rate of technological achievements and the corporate income tax burden, the turnover tax burden and the financial science and technology appropriation of enterprise is established. During the industrialization stage, the relationship between the three patents awarded rate and the corporate income tax burden, the turnover tax burden and the technology appropriation intensity is established. According to the data processing of the model, this paper considers that the incentive policy for corporate income tax is suitable for the research and development stage, and the turnover tax policy is suitable for the transformation stage and the industrialization stage.In the last part of this paper, some relevant suggestions are put forward which is based on the conclusion of the problem and the conclusion of the empirical analysis. Firstly, the overall level of tax incentive for management is considered, then it easy to establish a sound legal system. Secondly, the government can create a fair tax environment through the diversification of tax incentive and promote the economic positive interaction. Thirdly,the government should give some tax incentives on environmental protection of technological innovation. Fourthly,the government should establish a new tax incentive system which the indirect tax incentive is more important. Fifthly, tax incentive should match the enterprise technological innovation activities, then can encourage more technological innovation activities. Lastly, the government should transfer the previous tax incentive management and prepare tax expenditure budget. |