The invention relates to a device and a method for restoring chlorobenzene-type organism polluted soil and underground water, which belong to the technical field of environmental protection. The device comprises a direct-current power supply, PRBs (permeable reactive barriers) and electrodes, wherein concentric circular electrodes are installed in a polluted field, electrodes are plugged into electrode chambers, and the PRBs are installed in the middle part between an anode and a cathode and on the part, which is a quarter away from the anode, between the anode and the cathode. Through the electrode region, chlorobenzene in soil or underground water is gathered in the PRB area and then is removed through the oxidization reduction effect of the PRBs. By virtue of the device and the method, electrode fluid can be automatically updated and recycled, so that the economic expense can be reduced; the labor demand can be reduced; the operation is simplified; pollutants in the polluted region can be completely treated; the restoring speed of soil can be enhanced. By virtue of the device and the method, the treatment effect of chlorobenzene-type organisms in soil and underground water can be greatly improved. By virtue of a pH probe and an automatic control device, the treatment process is more automated.