<p>Over the past decade, environmental challenges and disruptions in the ecosystem have increasingly highlighted the need to assess the effectiveness of circular supply chain management. Particularly, the escalating per capita consumption of plastics in the agricultural sector, coupled with the resulting environmental issues, underscores the urgency of evaluating supply chain management practices within the plastics industry. The objective of this research is to explore the impact of digitalization on the performance of circular supply chain management in the plastics sector. The statistical population for this study consists of the plastics industry within the agricultural sector. A purposive sampling method was employed in this research. This study is classified as applied research and adopts a descriptive-analytical approach to data collection. In terms of data type, the research is quantitative, and it adopts a cross-sectional design to examine data at a specific point in time. A system dynamics approach was utilized to develop the model and analyze the data. Specifically, this research investigates the influence of Internet of Things (IoT) technologies and transportation system management on the performance of the circular supply chain. The findings of this study reveal that transportation management platforms, enabled by IoT networks, not only optimize logistics by eliminating queues and obstacles but also support environmental sustainability by minimizing waste.</p>