Abstract: The construction of high-speed railway is a revolutionary progress in transportation mode. In recent years, China's high-speed railway has been built rapidly, and the accessibility of urban high-speed railway has been strengthened, which has reduced the difficulty of inter-city personnel and technology flow, shortened the time distance between cities, and changed The concept of commuting has broken the barriers of technical exchanges between cities. Taking 110 cities in the Yangtze River Economic Belt as an example, this paper uses the Difference in differences method to study the impact of high-speed rail first-city accessibility on green technology innovation and the spillover effect of high-speed rail on science and technology practitioners in different cities. The study found that in the core cities of the Yangtze Economic Zone and small and medium-sized cities, the accessibility of high-speed rail is generally proportional to green technology innovation, but this promotion is not through the increase of technology practitioners, but through the introduction and diffusion of technology. Sexual enhancement has caused technology practitioners to flow out to first-tier cities, and urban wage levels are an important way to increase the attractiveness of technology practitioners. Research provides reference recommendations for high-speed rail planning and construction in various regions and their rational use.

CICTP