The utility model discloses a water -cooling combined electrode for producing mineral wool electric arc furnace, this electrode is constituteed by upper and lower two sections, and the upper segment is the metal water cooled electrode, and the hypomere is graphite electrode. The electrode is the cylinder, and the upper segment and the hypomere of electrode pass through the connection of metal screwed joint. The metal water cooled electrode includes two concentric pipes of inner tube and outer tube, and the inner tube is fixed outside on the inside pipe wall by the fulcrum of equipartition, the lower part and the metal screwed joint of outer tube are connected, the top of outer tube do not is equipped with water supply connector and water connectors, the outer tube upper portion top edge weld of water cooled electrode has the closing plate, on the closing plate face bonding useful in hoist and mount the electrode rings. The utility model discloses simple structure, it is longe -lived, reducible graphite electrode's oxidation, this electrode is used for the non - protective atmosphere's of high temperature mineral wool electric arc furnace heating work environment, can effectively reduce graphite electrode's in the production oxidation loss in high temperature air. Both guarantee the electric conductivity of electrode, also reduced graphite electrode's cost.