Aiming at the problem of how China conducts international technology diffusion to ASEAN, the connotation of China's technology diffusion to ASEAN under the path of patent reference is defined through literature review, and then a retrieval method to identify China's patent data cited by ASEAN is proposed. On this basis, using non-linear fitting, social network analysis and other models, based on the three-dimensional framework of time-space-industry, the current situation of China's technology diffusion to ASEAN is analyzed, and the spatio-temporal integration and evolution of China's technology diffusion to ASEAN and the optimization path of industrial network is further clarified.