For stainless steel pickling sludge, there are problems such as difficulty in bulk and resource treatment. A technical idea of using oxidized pellet process to treat stainless steel pickling sludge is proposed, and the effects of adding stainless steel pickling sludge on the mass of oxidized pellet green pellets, preheating and roasting pellet quality and chemical composition are systematically studied. The results show that adding a small amount of stainless steel pickling sludge can significantly improve the falling strength and compressive strength of green pellets, and improve the compressive strength of preheated pellets and roasted pellets. After the addition of pickling sludge, the CaF₂ in the sludge will reduce the melting point of multiple systems in the pellet and strengthen the recrystallization of Fe₂O₃. The optimal process parameters are determined to be the addition of 4% pickling sludge, the preheating temperature is 1 050 ℃, the warm-up time is 15 min, the roasting temperature is 1 250 ℃, the warm-up time is 15 min.