The utility model discloses a medium voltage power cable's polarization depolarization current testing arrangement, shell including the aluminum alloy is made sets up high voltage dc source, pi anbiao, circuit switching device in, the shell surface is inlayed and is established industrial computer, current signal input end, test high voltage output end, high voltage power supply functional earthing end, switch earthing terminal, earthing of casing end, circuit switching device's motionless end and test high voltage output end are connected, and of circuit switching device moves that the end is connected with the switch earthing terminal, another moves to hold and be connected with the high voltage dc source, and the high voltage dc source is held with high voltage power supply functional earthing and is connected, pi anbiao's input and current signal input end are connected, the industrial computer is connected with pi anbiao, circuit switching device respectively. The utility model discloses it easily receives interference and the complicated problem of wiring among the prior art to be used for solving among the polarization depolarization current method test procedure to the polarization depolarization current testing arrangement who forms convenient to use and carry.