Blast furnace dust and sintering dust are two typical iron-containing solid waste resources generated in the process of the ironmaking. In order to promote the utilization of blast furnace dust and sintering dust，chlorination segregation and roasting-magnetic separation are used to prepare high-quality iron concentrate through the synergy of the two. The results show that the carbon in blast furnace dust can be used as a reducing agent，and the potassium chloride in sintering dust can be used as a chlorinating agent，and the two can effectively separate iron minerals，gangue and lead-zinc minerals synergistically together. Under the condition that the mass ratio of blast furnace dust and sintering dust is 4∶ 6，the roasting temperature is 800 ℃ and the roasting time is 15 min，the magnetic separation concentrate with iron grade of 59. 46% ，iron recovery rate of 96. 81% ，lead removal rate of 48. 73% and zinc removal rate of 48. 15% can be obtained， which is a high-quality sintering raw material