Introduction
The overhead contact line system(OCS) is the power source of railways, and China,s high-speed railway operation mileage ranks first in the world. To ensure the safe operation performance of trains and reduce energy consumption, electrified rail construction adopts many new technologies and processes. In order to cultivate power suppliers who have railway dreams and serve the development of railways in the new era, this course is designed based on the "OCS Maintenance Position" skill training standards, typical work tasks, and job abilities released by China Railway Corporation. With the in-depth promotion of the "the Belt and Road", railways have played a fundamental and leading role in infrastructure connectivity,. This course adds a large amount of materials based on Chinese railway standards to help Chinese railways go global.