The utility model relates to a magnetic ferric oxide electrode, comprising a hollow closed-ended cylinder, an inner copper plating layer, an inner cavity, an insulating material layer, a PVC (polyvinyl chloride) pipe and a cable; the cable penetrates through the PVC pipe and the insulating material layer and is electrically and fixedly connected with the inner copper plating layer, the insulating material adopts epoxy resin to form a guiding channel, the central part of the inner cavity is filled with polyvinyl benzene and is integrally wrapped by the hollow closed-ended cylinder to form an electrode body. The magnetic ferric oxide electrode has good conducting performance, when current flows through, the surface potential and current and temperature rise distribution of the electrode body are uniform, polarization potential of the used material is low, the borne current density is high, the anode consumption rate is low, the corrosion resistance and stability are good, and the service life is long. The selected raw material has low independence on the temperature, cracking and breakage are hard to happen, the price is low, the construction is convenient, the cost performance is high and the application prospect is wide.