Abstract:As an important part of aircraft, the cable is crucial to aircraft performance and the flight safety. Because of the difficulty to locate the fault after aerospace-cable been installed in the plane, this paper has researched basic characteristic of the cable and studied the fundamental theory of TDR. Then the experiments are designed and conducted, which not only validates the fault location method based on TDR, but also obtains the effective waveform of typical cable faults and the criterion. These result could provide a guide of fault identification and location, and reduce time.