In order to explore the reasonable configuration of limonite in the sintering process under the condition of all imported iron ore, in view of the actual raw material and fuel conditions of the 500m2 large-scale sintering machine of S Steel, based on the conventional physical and chemical properties and high-temperature basic characteristics of the iron ore powder used in the test, the experiments of sintering cups with different limonite ratios were carried out, and the content of the adhesion powder and the theoretical slag phase formation and performance with different limonite ratios were simulated and calculated by using the Factsage 7.1 thermodynamic calculation software. The results show that Australian Limonite is characterized by coarse particle size, weak mineralization ability, low assimilation temperature, poor bonding phase strength and strong slag phase absorption, when the ratio of limonite is increased from 45% to 55%, the OD ore ratio of magnetite will be increased to 15%, while the ratio of OC ore will be reduced to 10%, the sinter drum strength and low-temperature reduction and pulverization index will be improved. This is because, on the one hand, increasing the OD ore ratio of the magnetite concentrate not only has the effect of increasing the proportion of adhesion powder, improving the amount and performance of slag phase formation, but also can uniform slag phase distribution and eliminate over-melting. On the other hand, increasing the ratio of OD ore can improve the particle size composition of the sinter mixture, and reduce the amount of slag phase absorbed by the limonite, thus the strength of sinter is increased. Therefore, it is conducive to stabilize the sinter quality and improve the sinter performance by increasing the appropriate ratio of magnetite ratio under the condition of high limonite ratio.