Understanding the evolution of the industry-university-research collaboration(IUR) in the Chengdu-Chongqing Economic Zone is crucial for promoting high-quality coordinated development in the region. Based on a multidimensional network perspective and utilizing social network analysis, the evolutionary characteristics of IUR collaboration in terms of spatial, technological and innovative entities was examined. The results are as follows. A spatial network has emerged with a dual-core innovation pattern centered around Chengdu and Chongqing, supported by cross-regional connections with first-tier cities such as Beijing and Shanghai. Technological innovation demonstrates stability in focal technologies, widespread application of dominant technologies and trends in interdisciplinary collaboration. In the network of innovative entities, an innovation pattern dominated by enterprises and supported by universities has initially formed, with the industry-university cooperation model prevailing.