The liquid absorption characteristics of four typical rich ore powders and their effects on the consolidation strength of sintered bodies are studied by micro sintering, ore phase analysis. The results show that, at 1280°C , the absorption depth of each iron ore powder is very different under the conditions of Fe₂?O₃? reagent with 15% CaO as the adhesive powder and the coarse particles of typical rich ore powder as the nuclear particles; limonite has the largest liquid absorption depth and the smallest effective liquid phase fluidity due to its loose structure, while dense hematite has a small liquid absorption depth and large effective liquid phase fluidity. At the same time, the consolidation strength of the sintered bodies of different iron ore powder nuclear particles decreases with the increase of the absorption depth of the nuclear particles, and increases with the increase of the effective liquid phase fluidity. The test results are further verified by the single-ore sintering cup test. In actual production, reasonable ore blending or optimizing the sintering process can be adopted to inhibit the negative impact of strong liquid absorption minerals, so as to improve the consolidation strength of sinter.