The special alloy welding wire designed and produced by the additive effect of some refractory metal elements has excellent high temperature strength and creep resistance, can enhance the high temperature wear resistance of the material, and greatly reduce the damage caused by cold and heat fatigue. The material after welding with this special alloy wire has room temperature hardness of 61HRC, good plasticity, and low welding crack tendency. It is suitable for remanufacturing and repairing parts used under high temperature conditions, such as hot rolls.