Abstract:In order to avoid falling into the dilemma of innovation-driven high-quality development caused by the negative impact of breakthroughs in key and core high-tech industrial technology on the entry of new enterprises in industry-related upstream manufacturing industry, this paper attempts to explore the externality of the effects of breakthroughs in key and core high-tech industrial technology from the industry level. Based on the research and development data of high-tech industry in 30 provinces of China and the micro-data of Chinese industrial enterprises, the leap-forward quantitative indicator of key and core technology breakthroughs in high-tech industry is constructed, and the industrial correlation between different manufacturing industries and high-tech industry is measured by the distribution coefficient, and how it affects the new enterprise entry is empirically tested. The results show that key and core technology breakthroughs in high-tech industry are not conducive to the entry of new enterprises, especially the upstream enterprises with high industrial correlation, and the main influence mechanism is to make the upstream enterprises with high industrial correlation less efficient in demand acquisition and more frequent in technology conversion, resulting in the deterrent effect of demand acquisition cost and technology conversion cost; moreover, the central and western regions and regions with high marketization level, industries with low sunk costs and high economies of scale are subject to more significant entry inhibition, especially in the Yangtze River Economic Belt where the new enterprise entry inhibition of technological breakthroughs is much higher than the overall average of the sample. In order to resolutely advance breakthroughs in core technologies in key fields, while building a solid foundation for the development of the real economy, corresponding policy recommendations are made in terms of optimizing the spatial layout of high-tech industry in key regions, encouraging creative cooperation between new entrants and incumbents, building a unified national market for innovation factors and deepening the reform of the commercial system and administrative approval.