The invention relates to a method for improving metallurgical performance of sintered ore. The method comprises the following steps: performing first-time uniform mixing and second-time mixing pelleting on sintering raw materials and fuel to form a sintering mixed material, wherein calcium chlorate is added in the sintering mixed material during first-time uniform mixing and second-time mixing pelleting to obtain a sintering mixed material A, a sintering mixed material B and a sintering mixed material C, and the calcium chlorate is added in a form of a saturated solution; and taking the sintering mixed material A as a bottom layer sintering material, taking the sintering mixed material B as a middle layer sintering material, taking the sintering mixed material C as an upper layer sinteringmaterial, igniting and drafting after adding all the three sintering mixed materials to perform sintering to obtain a finished product sintered ore. The calcium chlorate is added in the sintering mixed material, the calcium chlorate is heated and decomposed to release oxygen, so that the content of oxygen in the sintering material layer can be increased, the proportion of calcium ferrite in the sintered ore is increased, and the reducing property and the softening-melting and dropping property of the sintered ore are improved; meanwhile, the formed calcium chlorate is attached to the sinteredore uniformly, so that the low-temperature reducing pulverability of the sintered ore is improved.