Aiming at the problem that the sulfur migration law in the sintering process is not clear enough, a steel enterprise in north China is taken as the research object, and a systematic and comprehensive sulfur balance calculation and analysis on the production data of the sintering process is conducted. The results show that the main sources of sulfur in the sintering process are fuel, blending ore and return ore, accounting for 87.81% of the sulfur revenue. The migration behavior and law of sulfur in the sintering process are analyzed in detail, and it is found that sulfur is mainly discharged with the sintering flue gas in the form of SO₂, and the rest remained in the finished sinter, return ore and fly ash in the form of sulfate.