With the coordinated development of the Beijing-Tianjin-Hebei Region entering a new phase, the optimization and upgrading of the port logistics system have become critical factors in driving the economic vitality of the hinterland. The entropy weight method and a coupling coordination model were used to quantitatively analyze the interactive relationship between port logistics and hinterland economy in the four major port clusters of the Beijing-Tianjin-Hebei Region from 2017 to 2021. The results indicate that the efficiency and service capabilities of port logistics in the four major port clusters improved during the period from 2017 to 2021, with Tianjin Port showing the most significant performance. However, its direct driving effect on the hinterland economy remains limited. The coupling coordination level between port logistics and the hinterland economy in the Beijing-Tianjin-Hebei Region is still in a stage of mild imbalance, with uneven development within each port cluster, indicating that further potential needs to be unlocked. It is recommended to enhance the coordination between port logistics and the hinterland economy by optimizing port functional layouts, aligning with hinterland industries, deepening port collaboration mechanisms, and improving infrastructure construction, thereby promoting high-quality and sustainable regional economic development.