Abstract:Conducting an empirical study on the impact of tax structure on patent output. we select the panel data of 11 provinces and municipalities in the Yangtze River Economic Belt from 2010 to 2019, construct a fixed-effect regression model and a threshold model, explore the relationship between direct tax and indirect tax and the patent output of the Yangtze River Economic Belt, and determine the rationality of the tax system structure affecting the innovation and development of the Yangtze River Economic Belt. The results show that the current tax system structure is not conducive to the improvement of the patent output level in the Yangtze River Economic Belt, and both direct and indirect taxes have negative effects on patent output; the tax system structure has a significant single threshold effect of per capita GDP on patent output. With the improvement of the level of economic development, the effects of indirect taxes and direct taxes on patent output show a trend of gradually weakening. Therefore, the state and local governments should continue to deepen the reform of structural tax reduction policies to reduce the tax burden of taxpayers, improve the inclusiveness, guidance and precision of tax incentive policies, strengthen the protection of intellectual property rights, and build a team of scientific and technological innovation talents.