Objective:To explore the efficacy of hyperbaric oxygen combined with stent implantation(CAS)in the treat-ment of cerebral infarction complicated with extracranial segment vascular stenosis,as well as its influence on the rehabilitation of limb function in patients.Methods:A total of 82 patients with cerebral infarction complicated with extracranial vascular ste-nosis were included in this study.They were divided into the combined group and the control group according to different treat-ment methods,with 41 cases in each group.The control group received CAS treatment,and the combined group received hyper-baric oxygen therapy on the basis of the control group.The clinical efficacy and muscle strength of the two groups of patients after treatment were compared,and the limb function and cognitive function scores of the two groups of patients before and af-ter treatment were also compared.Results:The total effective rate of the combined group was higher than that of the control group(97.56%vs.80.49%,P<0.05).After the treatment,the muscle strength classification of the combined group was bet-ter than that of the control group(P<0.05).The total scores of the upper limbs,lower limbs and FMA in the combined group and the control group after treatment were all higher than those before treatment(P<0.05),and the combined group was higher than the control group(P<0.05).The MMSE and MoCA scores of the combined group and the control group after treatment were both higher than those before treatment(P<0.05),and the combined group was higher than the control group(P<0.05).Conclusion:Hyperbaric oxygen combined with CAS has a definite therapeutic effect on cerebral infarction compli-cated with extracranial segment vascular stenosis.It can effectively improve the cognitive function of patients,and is also condu-cive to enhancing the muscle strength of patients,which has a positive effect on the rehabilitation of limb function of patients.