According to the design scheme of the 2022 Winter Olympics support project,apparent resistivity measurement in short electrode spacing wells will be installed at 8 stations,(i.e.,Baochang,Jining,Yangyuan,Datong,Daixian,Linfen,Tongzhou and Pinggu station),around vicinity of Shanxi-Hebei-inner Mongolia area. Following the observation requirements of well apparent resistivity measurement,the underground special cable is designed. During the implementation of the project,the main indexes such as cable DC resistance and line to line insulation resistance are tested. The results show that the special cable of this project is suitable for underground earth resistivity observation and can guarantee the long-term stability of underground earth resistivity observation device.