To summarize the results of research of key technologies for digital installation of OCS engineering of high-speed railway,a precise calculation platform based on the finite element technology for cantilevers and integral droppers,precise measurement technologies for locating of masts,calculation data of span length/cantilever and dropper,automatic production line for pre-assembling of OCS cantilever and integral dropper as well as the special digital tools for installation,and the railcar-carried inspection and intelligent analyzing system for the key structural dimensions of OCS are studied and developed.The results of research have changed the traditional calculation,manual installation,and repeated adjustment methods,providing technical support for promoting the intelligent construction of OCS engineering of high-speed railway in China.