The invention relates to a transformable array 
electrode type remediation device for heavy 
metal polluted soil. The device is characterized in that a soil chamber is arranged around a central 
electrode chamber, and the soil chamber and the central 
electrode chamber form concentric circles; a PRB (
Permeable reactive barrier) is arranged in the concentric circles in the direction vertical to the 
electric field direction, and the central electrode chamber and the PRB form concentric circles; the space between the central electrode chamber and a PRB body is filled with a medium filler; six hollowvertical column type 
anode chambers are uniformly distributed on a circular arc of the soil chamber and are treated as surrounding electrode chambers; filtering nets are attached to the soil chamber,the 
anode chambers, the PRB, and the inner walls, adjacent to 
cathode chambers, of the PRB; electrodes are arranged in the 
anode chambers and the 
cathode chambers. According to the device, the array electrode arrangement mode is adopted, so that the remediation efficiency is improved; the remediation period is reduced; the size of the electrode chamber is adjustable; the electrodes can move, thusthe device can be switched among different remediation ranges, and as a result, the practicability is high; the electric remediation mode and the PRB are combined, so that the heavy 
metal in the soilcan be efficiently removed.