In this study, Glomus geosporum was inoculated under different strontium concentrations (0, 75, 725, and 975 mg/kg) to compare its regulatory effect on Sorghum bicolor (L.) Moench to repair strontium-polluted soil. The results showed the following:the mycorrhizal colonisation rates of G. geosporum were higher than 50% under all treatments. Compared with controls, the biomass, plant height, and root length of sorghum inoculated with G. geosporum significantly increased at 75 mg/kg (P<0.05). Inoculated sorghum showed significant mycorrhizal dependency (P<0.05). The mycorrhizal dependencies were the highest at 75 mg/kg (136.92%), and mycorrhizal dependence of 0-975 mg/kg was greater than 100%. Sorghum colonised by G. geosporum had significantly higher strontium content in the leaves and roots at 75 and 725 mg/kg, compared with that in the controls (P<0.05), and the translocation factors of the AMF group were higher than that of the non-AMF group. The concentrations of strontium in sorghum aboveground structures and roots 7increased by 86.05% and 30.18%, respectively. Both the total and available phosphorus content in the soil decreased significantly (P<0.05). Total phosphorus decreased by 6.52%-18.77%, and available phosphorus decreased by 12.38%-27.43%. Inoculation with G. geosporum significantly increased soil phosphatase activity (P<0.05), which increased by 19.67%-32.56%, compared with that in the non-AMF group. In summary, G. geosporum can promote the enrichment ability and tolerance of sorghum to strontium, and the effect of inoculation under strontium concentrations of 75-725 mg/kg is the most effective.