Based on the latest national innovation survey enterprise data base，this paper analyzes the impact of different levels of human capital investment on various types of innovation performance．The theoretical research shows that human capital investment will significantly improve the innovation achievements of enterprises，and enterprises will put high-level human capital into high-quality innovation activities．The more high-level human capital investment，the higher the overall innovation quality of enterprises．Through the data test of Chinese micro enterprises，it is found that: firstly，on the whole，the investment of human capital at the doctor，master and bachelor levels will promote the increase of the overall innovation achievements of enterprises．Secondly，after distinguishing the types of enterprise innovation，the investment of human capital at the level of doctor and master will only significantly promote the innovation，and the investment of human capital at the level of bachelor will significantly promote the three kinds of innovation results．In addition，the output elasticity of utility model innovation is the largest．Thirdly，the impact of human capital investment on the overall innovation quality of enterprises can be found that high-level human capital investment is more conducive to promoting the overall innovation quality of enterprises． Fourthly，by investigating the economic benefits of different innovations，it is found that innovation of invention utility model improves the business performance of enterprises significantly more than design innovation，and the difference of economic benefits between innovation of invention and utility model is small． For enterprises，both innovation of invention and utility model are high-quality innovation． Fifthly，according to the investigation of factor intensity，the labor-intensive enterprises have less input of high-level human capital，and capital intensive enterprises，and the overall level of human capital always input of capital in state-owned enterprises is higher．
