Abstract: In order to help the communication department to master the status of operation and maintenance of the communication equipment and to improve the process of equipment operation and maintenance, a suite of application functions of railway communication intelligent operation and maintenance is developed based on the big data platform for railway communication and signal. Firstly, a brief introduction is made to the architecture of the platform. Then, the business analysis and function design of railway communication intelligent operation and maintenance application are described. And the key technologies used to implement those function are summarized, including data access, geographic information application and data visualization. Through the development of the functions of integrated monitoring, full life cycle management and intelligent fault diagnosis of the communication equipment and so on, the data now available in communication department can be more fully tapped and displayed flexibly in various visualized manners, thus providing rich and intuitive information and accurate decision-making basis for the communication staff. Those application functions have been integrated with the big data platform, good effects have achieved in trial operation on site.