Abstract: In response to the low efficiency of data file replacement and the possibility of operations outside the skylight point during the renovation of the Centralized Traffic Control (CTC) system for railway operation lines, this paper designed a one click replacement system for station CTC data files under the communication and signalling safety control mode. The paper utilized key technologies such as gSOAP (Genivia Simple Object Access Protocol), multithreading technology, storage methods for dual machine file servers, and CRC32 algorithm of verifing data files, implemented the one click replacement function of CTC data files in the communication and signalling safety control mode. The system has been promoted and applied in multiple railway group companies. Railway stations used it under the communication and signalling safety control mode to synchronize station CTC data file replacement operations, ensured the safety of the replacement operation process from the source, further improved the quality and efficiency of the replacement operation. It has achieved good application results.