Abstract: The oxidized pellets were prepared with Fe2O3 and additional SiO2, CaO and MgO separately. The influences of two reducing atmospheres, including H2 and CO and gangue composition on pellets' reduction swelling were investigated. The results showed that the increasing of H2 in reducing atmosphere is good for lowering the reduction swelling, which ensures the intact grain structure and good quality of pellets. Meanwhile by adding a little CaO in Fe2O3 pellets, some liquid phases are generated in sintering and the metallurgical properties of pellets are improved. However, the amount of CaO should be controlled. Guaranteeing the product quality, slag connection can be obtained in sintering by controlling the TFe of pellets properly and adding some gangue, which lead to the improved strength and reduced reduction swelling. In addition, the properties of the pellets containing some MgO are improved due to the formation of a stable crystal structure.