In order to simultaneously detect the cable faults on different branches of the cable bundles and multi-core cables, a multi-channel noise time domain reflectometry is proposed and experimentally demonstrated. Amplified spontaneous emission (ASE) noises after multipath filtering serve as probe signals to detect different branches of cable bundles or multi-core cables. Based on correlation detection technology, the cable faults of different branches are detected simultaneously with no mutual interference. The experimental results indicate that the proposed method can detect open circuits, short circuits and impedance mismatches on different cable branches simultaneously. Moreover, for the single URM43 coaxial cable, a maximum detection range of about 720 m is obtained when the power of the noise detection signal is -9.1 dBm. In addition, it is experimentally proved that the proposed method can realize live test of cable fault.