采用大系统递阶优化控制理论和方法，提出了水资源宏观管理决策支持系统模型．根据水资源系统、经济系统、社会系统的关联度，建立了宏观管理决策模型，并提出将整个系统所能获得的总净效益极大化作为水资源宏观管理决策支持系统模型的目标函数．通过实例分析、运用数字仿真、调整灵敏度等，验证了宏观管理决策模型运行结果的可靠性和准确性． Adopting the theory and method of large-scale hierarchical optimization control, a model of water resources macro-management decision support system is proposed. According to the relation of water resources system, economic system and social system, the macro-management decision-making model is established and the maximization of the total net benefits gained by the whole system is proposed as the objective function of the water resources macro-management decision support system model. Through the example analysis, the use of digital simulation, adjust the sensitivity, etc., verify the reliability and accuracy of the results of macro management decision making.