Scheme decision-making on the construction diversion based on discharge control of the upstream hydropower station is characterized by multi-objective and bilateral conflictive. The combination of the upstream reservoir limited water level and the downstream hydropower station construction diversion standard were used as diversion scheme set. Based on the establishment of comprehensive evaluation index system and with the consideration of the randomness of the hydrological and hydraulic, Monte Carlo method was used to estimate every risk-performance evaluation index. Based on bargaining weight theory, the weight distribution was regarded as focus of conflict and dispute between upstream and downstream hydropower station in the decision process, a bargaining weigh situation was set up, and the improved entropy weight was introduced to establish loss function calculating model. Engineering case analysis showed that this model and method are practical and effective, the weight distribution after negotiation is more balanced and overall, reflects the coordination and solving of conflict, and decision results are reliable.
