A cable having a current leakage detection function includes three current-carrying core wires. Each current-carrying core wire is wrapped by an insulating layer, so that the current-carrying core wires are electrically insulated from one another. The insulating layer of at least one of the current-carrying core wires is wrapped by a metal wire net. Current guiding wires in contact with the metal wire net or a single-sided conductive film laminated outside the metal wire net is utilized to achieve the effect of timely and effectively conducting a leakage current to a leakage current detection device, so as to improve the reliability of leakage current detection.