设计优化是民生水利项目可持续发展的重要保障。然而,在现行定价机制和建设体制双重制约下,优化服务的供给严重不足。本文以农业节水工程设计的寿命周期成本优化服务(LCCA)为例,分析了LCCA具有现时需求不足的跨时公益性和供给的自然垄断性,认为其价格规制应侧重对优化服务的激励和扶持。因此,收支平衡导向的投资回报率定价机制更为合理。在此基础上,本文提出了现行设计价格机制的改善路径。 Design optimization is an important guarantee for the sustainable development of Minsheng Water Conservancy Project. However, under the dual constraints of the current pricing mechanism and construction system, the supply of optimized services is seriously inadequate. Taking LCCA as an example, this paper analyzes LCCA’s cross-temporal public welfare and natural monopoly of supply with insufficient demand at present, and considers that LCCA should focus on incentives for optimizing service and Support. As a result, a ROB-led pricing mechanism is more reasonable. On this basis, this paper presents the improvement of the current design pricing mechanism.