The invention provides a method for treating refractory red iron ore based on staged combined magnetizing roasting. The method comprises the following steps of (1) crushed refractory red iron ore rawore is screened and classified, and the crushed refractory red iron ore raw ore is divided into a powder ore material and a lump ore material; (2) dry powder preparation is carried out on the powder ore material, a fine grain powder ore material is obtained, flash magnetizing roasting of the fine grain powder ore material is carried out, and a powder ore roasting ore is obtained; and magnetizing roasting is carried out on the lump ore material by adopting a vertical furnace or a rotary kiln, and a lump ore roasting ore is obtained; (3) the lump ore roasting ore is carried out pre-selection tailing, so that lump ore tailing rough concentrate ore is obtained, and tailing ore is directly thrown away; and (4), the lump ore tailing rough concentrate ore is carried out a primary grinding and classifying operation, and a primary classifying overflow product is obtained; and the primary classifying overflow product and the lump ore roasting ore are combined to enter a sorting process, a finaliron ore concentrate product is obtained, and the tailing is directly thrown away. The method for treating refractory red iron ore based on staged combined magnetizing roasting has the advantages of being simple in process, stable in control, energy-saving and environment-friendly, high in adaptability, and good in beneficiation product quality.