<p><?tk 2?>Against the backdrop of “dual-carbon” target and regional synergy strategy, green low-carbon technology innovation increasingly relies on cross-regional collaboration. This study aims to examine the evolution and determinants of green low-carbon technology cross-regional collaborative innovation networks, with a specific focus on industry-university-research (IUR) partnerships. Based on a dataset of 23,773 Chinese green low-carbon technology patents, we conduct this research using social network analysis and the quadratic assignment procedure. The analysis yields three main findings. First, cross-regional IUR collaboration in green low-carbon technology has grown significantly in both quantity and scale over time. Second, the cross-regional IUR collaborative innovation network has evolved from a structure dominated by a few core provinces into a more balanced and flattened configuration. The network also exhibits enhanced small-world characteristics, reflected in high clustering coefficients and short average path lengths. Third, regional linkage factors show contrasting effects. Geographic, institutional, and social proximity positively shape the cross-regional IUR collaborative innovation network. In contrast, differences in technology, talent, and industrial structure also facilitate cross-regional IUR collaboration in green low-carbon technology. This pattern reflects a dynamic of “seeking common ground while reserving differences.” These findings offer theoretical insights for advancing cross-regional green technology cooperation, while providing practical guidance for regional resource integration and the achievement of “dual-carbon” goals.</p>