Abstract: Strategic emerging industries are critical fields for gaining future competitive advantages, set against the backdrop of trade protectionism and economic globalization, vigorously developing strategic emerging industries is an important way to break the US technology blockade and has a long-term leading role in the overall economic and social development. Patents are the crystallization of knowledge and technology. How to compare the patent influence of China and the United States in strategic emerging industries is increasingly attracting the focused attention of academia and government departments. How to accurately assess the influence of patents has always been a focal point of interest. Numerous studies use various measures such as market value of the patent, citation count, patent scope, or other composite indicators based on patent citations to gauge patent influence. However, these indicators typically present two issues: first, they neglect the quality of the patent initiating the citation; second, patent citations exhibit a lag effect, and a simple citation count often underestimates the value of recently applied patents. PageRank is an algorithm widely used for web page recommendation. On the internet, important pages are more likely to be linked by other important pages. Taking advantage of this network characteristic, the PageRank algorithm considers the quality of the patent initiating the citation, assessing the influence of nodes within the network. When the PageRank algorithm is applied to a patent citation network, both theory and empirical statistics confirm its superiority; compared to citation counts, it can more effectively identify high-value patents. Moreover, compared to other traditional social network node analysis methods, the PageRank algorithm places more emphasis on the comprehensive influence of a node on other nodes. To investigate the patent influence of China and the United States in strategic emerging industries, the study utilizes patent application and citation data provided by Google Patent from 1985 to 2019 to construct an international patent citation network to analyze the influence of China and the United States in the patent network and China's core technology based on PageRank algorithm. The study shows that, firstly, the patent influence of China's strategic emerging industries is exhibiting a growth trend. As strategic emerging industries rise to national industrial policy, particularly after 2010, the number of related patents in China has surged, and international influence has greatly increased. However, compared to the United States, China's high-quality innovative output is still at a relatively low level. The rise in patent quality is not keeping pace with the increase in patent quantity. Secondly, the level of innovation in China varies across different industries. In terms of national patent influence, the influence of Chinese patents has rapidly increased in new-generation information technology industries and digital creative industries. In terms of core patents, in recent years, the number of core patents held by China in the new materials industry has surpassed that of the United States, becoming the only field among the nine strategic emerging industries where China exceeds the US. However, from the perspectives of both national patent influence and core patents, the gap between China and the United States is most significant in the biotech industry. Lastly, in recent years, China's patent influence globally has steadily risen. This is primarily attributed to the decline in patent influence of traditional industrial powerhouses in Europe, rather than a weakening of the US influence in the global technology innovation market. The United States continues to dominate global innovation in the biotech industry and related service industries. Based on the background of possible science and technology decoupling between China and the United States, this study assesses the patent influence of China's strategic emerging industries from a global perspective, and provides theoretical guidance and decision-making reference for industrial policies.