[Objective]Based on the patent perspective and the Belt and Road Initiatives, this study explored the characteristics and structure of international technology diffusion in different technological fields of major science and technology countries,represented by China and the United States. [Methods] Based on the data of PCT international patent cooperation and transnational patent application, this study used social network QAP analysis to measure the synergy of the two technology diffusion channels from the technical and regional levels. [Results] On the one hand, China ’s patent deployment along the Belt and Road region has achieved initial results. Technology diffusion formed a high degree of technological synergy. On the other hand, there is a certain gap between China and the United States in terms of the structure and extent of technology diffusion. [Limitations] The study only compared the technological diffusion of China and the United States without other countries’ technology diffusion. The characteristics of other types of technology diffusion channels such as intellectual property trade have not been analyzed yet.[Conclusions] Through the comparison of the technology diffusion structure of China and America and channels synergy analysis, this study provided a reference of implementing the Belt and Road Technology Strategy for China.