The iron and steel industry is a major contributor to carbon emissions in China,where the blast furnace （BF)- basic oxygen furnace（BOF) long process dominates the iron and steel production,and vigorouslypromoting hydrogen- enriched smelting in blast furnaces is one of the key measures to reduce the carbon emissions of the iron and steel industry. In this paper the reduction behavior of lump ore under hydrogen-enriched BF conditions was studied,the reduction andsoftening-meling-dripping characterisics of lump ore was systematically analyzed and the evolution laws of phase and structure during the reduction process was elucidated,thus providing theoretical guidance for the development of hydrogen- enriched BF ironmaking technology in China. The study results indicate that as the H₂ content in the reducing atmosphere increases,the low-temperature reduction disintegration index（RDI) of the lump ore decreases from 98.65% to 97.26%. However,limited by the dense structure of the lump ore,the changes in the reducing atmosphere have a minimal effect on its low-temperature reduction disintegration performance. With increasing H₂ content in the reducing atmosphere,the reduction degree（RD） of the lump ore rises from 53.02% to 96. 15%,an increase of 43.12 percentage points. The metallic iron produced primarily exists in a dense,single-phase morphology with low internal porosity. Furthermore,as the H₂ content increases,the softening-melting temperatures of the lump ore increase,which promotes the cohesive zone position to move down and helps expand the indirect reduction zone in the upper part of the blast furnace,thereby intensifying smelting and reducing coke consumption. The narrowing of the softening-melting temperature interval and the decrease in the maximum pressure drop improve the permeability and gas flow distribution within the furnace,which can increase the gas utilization efficiency.