The invention discloses a power cable fault detection apparatus including a moving base, a lifting assembly, a support platform and a detection assembly, the moving base is connected with the support platform through the lifting assembly, the detection assembly is arranged on the support platform, the lifting assembly includes a lifting fork, and two sets of driving assemblies arranged at the top and bottom of the lifting fork, and the detection assembly includes a mounting seat, an adjusting rod, a rolling electric brush, a Hall current sensor, a voltage transformer and a hydraulic cylinder. The power cable fault detection apparatus is simple in structure and convenient to move, and improves the detection safety and efficiency.