Antimony (Sb) pollution is causing serious concerns in some regions globally, such as around the XiKuangShan mine in China, which is the largest Sb mine in the world. However, remediation measures are scarce. In this study, we assessed the effects of two fertilisers, sodium dihydrogen phosphate (NaH₂PO₄ at 200, 500 and 2000 mg kg^-1) and calcium chloride (CaCl₂ at 20, 80 and 200 mg kg^-1), on uptake by rice (Oryza sativa L.) of Sb, cadmium (Cd) and arsenic (As) from contaminated soil under flooded conditions. Despite a very low soil As concentration (10.89 mg kg^-1), the results showed that flooded conditions will result in excess accumulation of As in rice grains. NaH₂PO₄ generally enhanced the release of As and Sb by increasing pH and competitive adsorption in the soil, which resulted in their accumulation in many tissues of the rice plants. NaH₂PO₄ (200 mg kg^-1) significantly reduced soil available Cd concentration by increasing soil pH, which resulted in a decrease in Cd concentration in the roots and husks. CaCl₂ at 200 mg kg^-1 decreased soil pH, and CaCl₂ treatments increased the available Sb concentration, although not as much as NaH₂PO₄. Both NaH₂PO₄ and CaCl₂ enhanced the formation of root iron plaques, and in many cases increased the concentrations of As, Cd and Sb in the root plaques, suggesting a storage role rather than a barrier of root iron plaques for plant uptake of As, Cd and Sb. CaCl₂ at 200 mg kg^-1 was the most effective treatment for reducing As, Sb and Cd concentrations in rice grains. We conclude that utilisation of fertilisers containing P on a soil co-contaminated by Sb and Cd poses a risk of Sb and As accumulation under continuous flooded conditions, whereas addition of CaCl₂ at 200 mg kg^-1 may control As, Sb and Cd accumulation in grains of rice plants under these conditions.