This study explores the syntactic network characteristics of English e-commerce live-streaming discourse by employing a syntactic treebank and syntactic complex network analysis. The main findings are: (1) The syntactic network of English e-commerce live-streaming discourse exhibits small-world and scale-free properties, which are hallmark traits of complex networks. (2) The central nodes of the network are be, I, and the, with be serving as the most central node, while I and the act as local central nodes. (3) The central node be demonstrates both strong centrifugal and centripetal forces. Its centrifugal force is most frequently associated with subject relations and adjective complements, while its centripetal force is characterized by auxiliary and clausal complements. These findings indicate that the syntactic structure of English e-commerce live-streaming discourse is highly robust. This robustness underscores the discourse’s functional purpose: to convey information clearly while engaging users through personalization and specificity. Furthermore, the study highlights the critical role of be in attributive and descriptive constructions. Overall, this research provides insights into the syntactic organization of e-commerce discourse and demonstrates the effectiveness of complex network analysis in linguistic studies.