Abstract: The network architecture of the railway information system is complex, the volume of business data is huge, and the system is interconnected. There are chronic security risks in the management of user identity information, such as easy disclosure of account information, illegal withdrawal of account rights and account sharing. By studying information automatic management technology, this paper designed the user identity automatic management system, implemented the functions of automatic detection, automatic password change and verification, automatic push, security backup, threat analysis and detection of user identity information of user identity information, solved the problem and difficulties of railway operation management departments in the process of user identity management, more comprehensively managed and protected the identity certificates of various types of resources, avoided resources information leakage or abuse due to improper management of user identity information, reduced the probability of data security accidents with user identity.