Abstract:Industry-university collaborative innovation is the internal driving force for regional coordinated development, and multi-dimensional proximity, as a key factor for innovation entities to acquire external knowledge, has an important impact on the performance of collaborative innovation. Based on the perspective of multi-dimensional proximity, this article uses the invention patent data jointly applied for and authorized by China Intellectual Property Administration of from 2009 to 2018 by 28 universities and 492 companies in Beijing-Tianjin-Hebei, and conducts an empirical analysis using a negative binomial regression model. The results show that: ①Geographic proximity has a significant role in promoting the collaborative innovation performance of industry-university; ②Institutional proximity has a positive effect on the collaborative innovation of industry-university; ③Technological proximity has a positive effect on the collaborative innovation of industry-university, and it has a significant inverted U-shaped effect on the performance of collaborative innovation; ④The interaction between technological proximity and geographic proximity will have a significant negative impact on the performance of industry-university collaborative innovation in Beijing-Tianjin-Hebei region; ⑤The interaction between technical proximity and institutional proximity has a significant negative impact on the performance of industry-university collaborative innovation in Beijing-Tianjin-Hebei region; ⑥The interaction of geographic proximity and institutional proximity has a positive but not significant effect on the performance of industry-university collaborative innovation in Beijing-Tianjin-Hebei region. Therefore, Beijing-Tianjin-Hebei region should increase investment in transportation infrastructure and communication networks, and strengthen the construction of independent technological innovation capabilities of enterprises, and accelerate the implementation and management of perfect systems and market integration policies, and play the interactive effect of multi-dimensional proximity on the performance of collaborative innovation. To realize the optimization and aggregation of innovation resources, Beijing-Tianjin-Hebei region should form the collaborative innovation community.