Abstract: With the continuous development of information technology, railway network security issues have become increasingly prominent. The railway integrated video surveillance system contains many important information. If there are problems such as information leakage, tampering, and illegal access, it will pose a serious threat to railway operation security. This paper proposed a network security solution for a railway integrated video surveillance system based on national commercial cryptographic algorithms. This solution not only meets the compliance requirements of the railway integrated video surveillance system in terms of network security classified protection, but also ensures the integrity and confidentiality of the information during storage and transmission. It can effectively prevent possible network security risks, maintain the safe and stable operation of the railway integrated video surveillance system, and provide technical support for railway transportation security.