The design of supporting terminals for hydropower stations often faces constraints such as complex terrain and geology，limited layout space，and large change in water level for loading and unloading operations. In view of the problems faced by the design of the supporting terminals of hydropower stations under complex conditions，taking the upstream supporting terminals of a hydropower station in the western region as an example，we probe into key issues concerning the overall plan layout of the terminals. Based on the functional positioning of the terminals in the reservoir area，we propose related solutions such as multi-site selection，function-based terminal zoning，control the amount of excavation works，and reasonable external traffic，and discuss the loading and unloading process schemes of barge-based fish collection and sewage ship.The result may serve as reference for similar projects.