The invention relates to a cable power frequency parameter testing device based on a PXI system. The cable power frequency parameter testing device is powered by being connected with a three-phase power supply, is connected with a cable and is mounted in a movable vehicle body. The cable power frequency parameter testing device comprises a three-phase voltage regulator, a three-phase transformer, a PXI test console, a far-end testing circuit, a voltage measuring line and a current measuring line. The input end of the three-phase voltage regulator is connected with the three-phase power supply, the output end of the three-phase voltage regulator is connected with the three-phase transformer, the output end of the three-phase transformer is connected with the input end of the far-end testing circuit, the far-end testing circuit is arranged on the cable, the output end of the far-end testing circuit is respectively connected with the voltage measuring line and the current measuring line, the voltage measuring line and the current measuring line are both connected with the PXI test console, and the PXI test console is respectively in both-way connection with the three-phase voltage regulator and the three-phase transformer. Compared with the prior art, the cable power frequency parameter testing device has the advantages of achieving integrated operation of program control and measurement, being high in integration level and the like.