Although the Beijing-Tianjin-Hebei Collaborative Development Plan was issued in 2015, there is still a large gap in the current level of innovation development and the scale of innovation resource allocation in Beijing, Tianjin and Hebei, restricting the coordinated innovation development of the three regions. 92.5% of Beijing's scientific research achievements have been industrialized in the Yangtze River Delta and the Pearl River Delta, which means that the innovation chain and industrial chain of Beijing Tianjin R&D and Hebei incubation transformation have not yet formed. It is difficult for Beijing's scientific and technological achievements to land in Tianjin and Hebei, and it is difficult for the industries in the three regions to coordinate with each other, which has become a prominent problem of Beijing-Tianjin-Hebei coordinated innovation. Understanding the status quo of Beijing-Tianjin-Hebei collaborative innovation and the characteristics of spatial network connection is the prerequisite for promoting collaborative innovation. The present research is inadequate to analyze in detail the level of collaboration between various regions in Beijing and Tianjin and cities in Hebei.#br#The ultimate goal of regional collaborative innovation is to narrow the innovation gap between regions. The most important way is to promote the free flow of innovation elements and innovation collaboration across regions and subjects. The innovation network is the most important spatial manifestation of regional collaborative innovation. This paper attempts to measure the level of Beijing-Tianjin-Hebei collaborative innovation from the macro and micro dimensions with focus on the differences between the collaborative innovation development and the Yangtze River Delta,the Guangdong Hong Kong-Macao Greater Bay Area, the status quo of the collaborative innovation development of 43 sub-units in Beijing-Tianjin-Hebei, and the construction of the Beijing- Tianjin-Hebei innovation network. On the macro level, focusing on the synergy among science, technology and industry, this study makes comparisons with the Yangtze River Delta and the Guangdong Hong Kong-Macao Bay Area, and summarizes the characteristics of Beijing-Tianjin-Hebei collaborative innovation by the entropy method. On the micro level, it analyzes the collaborative innovation in 43 sub regions, mainly using the entropy weight method. Given the collaborative innovation capability of each subdivided region, it further analyzes the construction of the Beijing-Tianjin -Hebei innovation network through network analysis by combining gravity model and social network analysis, and the analysis results are presented visually with ArcGIS software.#br#Compared with the two world-class urban agglomerations of the Yangtze River Delta and the Guangdong-Hong Kong-Macao Greater Bay Area, Beijing -Tianjin-Hebei has a very strong scientific research level and is at the front end of the innovation chain. The front end scientific research level and technology diffusion level of Beijing-Tianjin-Hebei are high, but the connection with the back end industrial chain is not enough, and the industrial development level is poor, which seriously restricts the improvement of the collaborative innovation level of Beijing-Tianjin-Hebei. The innovation and development of each region in Beijing, Tianjin and Hebei are not balanced. From 2014 to 2020, the level of collaborative innovation in Beijing-Tianjin-Hebei has been improved to a large extent, but the synergy between the main bodies is still at a low level, and the polarization has been accelerating. An efficient and collaborative innovation network has not been formed among Beijing, Tianjin and Hebei. Although the total amount and network density of the actual relationship of Beijing-Tianjin-Hebei collaborative innovation are growing rapidly, they are still at a low level. The network connections are mostly generated in Beijing, Tianjin and between Beijing and Tianjin, showing the spatial characteristics of Beijing and Tianjin as two poles, and gradually expanding to the surrounding areas. In the future, efforts should be focused on promoting the integration of context-driven innovation industries, improving Beijing's innovation radiation driving capacity, and building an innovation network with efficient collaboration between Beijing, Tianjin and Hebei.#br#