The short-term and long-term efficacy of recanalization therapy needs to be further confirmed by large-sample prospective studies. The comparison of success rate, complication rate and efficacy among the three recanalization modalities also needs to be further explored. The purpose of this cohort study is to observe the success rate, efficacy and safety of recanalization treatment for non-acute occlusion, and to further compare the advantages and disadvantages of CEA, endovascular intervention and hybrid surgery.