Abstract: Environmental issues such as high temperature, high humidity and salt spray at Wenchang launch site in Hainan province pose challenges to the design of tower cables for communication satellites. Therefore, based on the design of tower cable at Xichang launch site, this paper proposed that the tower cable was composed of three cable branches: A1, A2, and B. Then, according to the environmental characteristics of Wenchang launch site, the key points in design, laying and use of tower cable were detailed. Finally, the tower cable was tested and verified, and the test contents and matters needing attention were given. The designed tower cable has been verified on three communication satellites, and the test process has been basically solidified with the corresponding operational documents formed.