The invention discloses equipment for processing of stainless steel. The equipment comprises a furnace shell, a hearth, a gas inlet part arranged on the hearth, an opening formed in the furnace shelland matched with the gas inlet part, and a gas inlet pipe matched with the gas inlet part. The gas inlet part is provided with a connecting cavity. The bottom of the connecting cavity is provided witha gas inlet. A seal part is arranged in the connecting cavity. A first seal layer is arranged between the seal part and the bottom face of the connecting cavity. A second seal layer is arranged between the seal part and the gas inlet pipe. In the stainless steel processing technology, through matching of the seal part, the first seal layer and the second seal layer, seal matching between the gasinlet pipe and the connecting cavity is achieved effectively, the condition of gas leakage between the gas inlet pipe and the connecting cavity is avoided, a vacuum state in the hearth is maintained all the time, and degassing refining of molten materials in the hearth is achieved.