Abstract: The melting characteristics of agglomerating ferrite phase in high-basicity sinter were investigated and discussed to grasp the relationship between the melting temperature and the phase's composition by way of the experiments in which the mass fractions of nCaO:nFe2O3, w(MgO), w(SiO2) and w(Al2O3) in the agglomerating ferrite phase were all changed. The results indicated that melting temperature is the lowest with melting time the shortest if nCaO:nFe2O3=1:1, and the phase's melting temperature/time increases if adding MgO into the sinter. The melting temperature/time falls down to the minimum if the mass fraction of either w(SiO2) or w(Al2O3) is 3%.