As one of the most important facilities, The CSR power cables played a major role in powering device. Thecable temperature continued to rise as soon as it's energized with electrical power. High temperature may be caughta cable fire disaster, so the temperature alarm system is presented. The temperature alarm system for CSR PowerCables is designed and realized by the slow control group and the power supply group in IMP 2014. This is a effective means, and can accurately located the target cables.When the target cable temperature is higher than70?, the system can generate alarm signals, and sendthem to the GUI software. After practical running forseveral months, the system had shown its accuracy andreliability.