0.015%, 0.025%, 0.05% and 0.1% δ-MnO₂ were added to yellow soil of Guizhou Qinglong antimony mine by in-situ processing. After 20 days of flooding, the content of Mn and Sb in suspension and the content of each speciation of Mn and Sb in soil were determined, and the correlation analysis of each parameter were performed to clarify the effect of Mn oxides on the speciations of Sb. The results showed that the contents of Mn in suspension and three speciations of Mn in soil gradually increased with the increase of δ-MnO₂, and the order of Mn content of all speciations in soil was consistent with that in control soil. With the increase of δ-MnO₂, the contents of non-specific adsorption, specific adsorption and residual Sb decreased, while the content of Fe/Mn/Al oxide bound Sb increased. The Mn loading was significant positive correlation with all speciations of Mn and Fe/Mn/Al oxide bound Sb (P<0.05), and significant negative correlation (P<0.1) with residual Sb. Fe/Mn/Al oxide bound Sb and residual Sb were significant positive correlation (P<0.05) and negative correlation (P<0.1) with all speciations of Mn, respectively. δ-MnO₂ existed in various speciations in yellow soil. After flooding, the speciations of Mn transformed to different degrees, and various speciations of Mn were oxidized, adsorbed and complexed with Sb, which made the non-specific adsorption Sb, specific adsorption Sb and residual Sb transform to Fe/Mn/Al oxide bound Sb in soil.