Abstract: New infrastructure construction, as an important strategic initiative of China in recent years, still has certain shortcomings in the process of empowering high-tech industries, despite it can promote the integration and upgrading of a new generation of information technology and manufacturing. In order to explore the heterogeneous influence of the new infrastructure construction level on the development of high-tech industries, this paper objectively and systematically evaluates the level of new infrastructure construction in each province from 2013 to 2018, and empirically analyzes this influence mechanism using spatial panel econometric methods. The study shows that:(1) the level of new infrastructure construction has a "U-shaped" impact on the development of high-tech industries. In the short term, the current level of new infrastructure construction has a dampening effect on the development of high-tech industries; in the long term, when the level of new infrastructure construction reaches a certain stage, it will empower the development of high-tech industries. (2) The direct spatial effect of new infrastructure construction is significant, but the spatial spillover effect is still debatable, and the regional connectivity function of new infrastructure construction has not yet been fully played. Based on the findings of the study, corresponding countermeasures are proposed in three aspects:promoting new infrastructure connectivity, enhancing the level of new infrastructure empowerment and facilitating the inherent integration and interaction of new infrastructure.

Key words: new infrastructure construction, high-tech industries, heterogeneous influences, space overflow