In this paper combined with cathode protection works in Taiyuan water-supply engineering the cathode protection method, construction scheme selection, parameters determination are introduced, At last the installation measures and acceptance checking device are pointed out. 针对太原市城市给水工程DN2200输水钢管采用阴极保护的工程实例,介绍了牺牲阳极法,对工程方案的选择、参数的选择与确定进行了详细阐述,提出了工程安装措施及其验收装置。