The invention discloses an insulated part of a self-baking electrode protection device and an insulated material for manufacturing the same. The electrode protection device of a self-baking electrode comprises a plurality of fan-shaped sections which are arranged on the periphery of the electrode; the electrode protection device is arranged on an electrode bottom ring and supported by a bottom ring pull rod; a groove-shaped insulated part is arranged between the electrode protection device and the electrode bottom ring; and the fan-shaped bottom of the electrode protection device is embedded in the groove-shaped insulated part. Since the electrode protection device is wrapped by the insulated part, the electrode bottom ring and the electrode protection device can not be switched on by splashing conductive furnace slag, and the burning mark accidents of the electrode protection device can be greatly reduced, thereby decreasing the maintenance cost and improving the equipment operation rate.