Abstract: The Beijing-Zhangjiakou high-speed railway is an important transportation infrastructure serving the 2022 Beijing Winter Olympic Games and Winter Paralympic Games, and is also an important part of the rail transit network supporting the coordinated development of Beijing, Tianjin and Hebei. Relying on the Guanting Reservoir grand bridge project, a key project of Beijing-Zhangjiakou high-speed railway, this paper studied and sorted out the intelligent construction technologies used in the construction period of the bridge. The paper combined the whole life cycle intelligent monitoring system throughout the construction period, joint commissioning and test period and operation period with the intelligent maintenance vehicle equipment to form an intelligent operation and maintenance system. The experiences gained from the application of intelligent technology in the construction of Guanting Reservoir grand bridge of Beijing-Zhangjiakou high-speed railway can be copied and popularized to provide reference for the follow-up construction of smart railway.