To address the high transportation costs and severe carbon emissions caused by dam blockages at hydropower stations, a cross-dam energy-logistics coupled dispatching optimization method that integrates electricity-hydrogen-oil multi-energy complementarity is proposed. According to the flow diversion characteristics of cross-dam cargo between waterway and land routes, the operational characteristics of cross-dam logistics covering heterogeneous heavy-duty trucks and waterway handling facilities are analyzed, and energy consumption models for transportation equipment are established. Based on the operational power characteristics of facilities such as integrated hydrogen production-charging-storage stations, energy facility production models are constructed. Combined with the characterization of energy supply-demand coupling mechanisms, a cross-dam energy-logistics coupled dispatching optimization model is established. With the objective of minimizing operational costs while considering carbon emissions and load response capability, coupled optimization is performed on cross-dam energy and logistics systems to obtain cargo flow distribution and dispatching strategies for transportation and energy equipment. Taking a 6 400 MW hydropower station in Southwest China as a case study, simulation results demonstrate that the proposed method can effectively reduce cross-dam operational costs and carbon emissions.