Abstract: The article introduced the design, construction and implementation of communication transmission for Xiangtan Station of railway existing line modification project. According to the requirements of China Railways and Guangzhou Railway (group)Company, the communication at Xiangtan Station was also needed to reform. It was very difficult to both ensure uninterrupted railway communication, and keep communication time for transportation in accordance with the regulations. This paper discussed how to select the scheme and organize the construction correctly. Practice proved that the scheme and construction organization were feasible, the communication business was smoothly opened.