Abstract:On the basis of constructing the regional sci-tech financial development system to evaluate the development level of sci-tech finance in 30 provinces (cities), this paper constructs the panel model to analyze the effect of the development level of regional macro sci-tech finance on the R&D investment of micro firms.The results show that: (1) The development of sci-tech finance has a positive incentive effect on Firm"s R&D investment, which mainly comes from the sci-tech capital market and venture capital investment; (2) There are ownership differences and R$D intensity differences in the effect of sci-tech financial development on Firm"s R&D investment.Non-state-owned firms and firms with high R$D investment intensity receive greater support from sci-tech finance.