In this paper , the crosstalk and radiation of multiple - core cable is analyzed according as the multiconductor transmission line , two ports network and antenna theory . firstly the fundamental theories are presented 本文主要依据多导体传输线理论、二端口网络理论和天线理论对多芯电缆的耦合泄漏和辐射发射进行了较为详细的分析讨论。