In order to solve the technical problems of inland river port shore power supply with complex shore-based conditions and large water level difference change，the cruise ship terminal in Chongqing is used as the application object，and the shore power system is developed based on double power supply pontoons and suspended guide cable，which solves the problem of large changes in the ship-to-shore power supply distance caused by the large water level when the cruise ship docks at the dock.In addition，application technologies such as man-machine cooperative electronic control plug-in devices，roller-type cable trays，and integrated cloud management have been developed to improve the safety and convenience of shore power applications. These technologies have been successfully applied in many cruise terminals such as Chaotianmen，Wushan Cruise Center，and Shennyuxi in the Chongqing-Three Gorges cruise line on the Yangtze River.