The 14th Five-Year Plan puts forward the strategic goal of "making new progress in the construction of ecological civilization", and the construction of green municipal drainage facilities has become an important implementation path for urban sustainable development. In order to improve the green level of the drainage system, an evaluation index system for green municipal drainage facility projects is constructed, which covers five major categories of indicators such as safety and resilience, high efficiency and intensiveness, low carbon and energy conservation, green ecology, and intelligent management. Through the weight distribution and scoring mechanism, a comprehensive evaluation of the whole process of the construction and operation of municipal drainage facilities is realized, and the specific scoring points of various indicators are analyzed. This evaluation system proposes the differentiated green evaluation methods suitable for drainage pipe networks, pumping stations and wastewater treatment plants, which can provide the effective guidance for the construction and operation of green municipal drainage facilities, offer a solid technical support for achieving the goals of carbon peaking and carbon neutrality, and have the higher practical guiding significance.