Abstract: This paper studied on the application of distributed video monitoring system in railway construction engineering, solved the problems of intelligent construction safety management and insufficient timeliness in response to emergencies in the current railway construction engineering. By using network video monitoring technology, VPN technology and distributed architecture technology, the paper implemented the unified monitoring and supervision of decentralized control projects and key projects, and improved the ability to deal with emergencies in a timely manner. The results of trial operation proved the feasibility of the implementation of the distributed video monitoring system in railway construction engineering and met the needs of the construction safety management.