Abstract:[Objective] To compare the clinical efficacy of tibial transverse transport (TTT) combined with endovascular intervention (EVI) versus EVI only for severe arteriosclerosis obliterans (ASO) of the lower extremity. [Methods] A retrospective study was performed on 86 patients who received surgical treatment for severe ASO in our hospital from May 2018 to January 2021. According to doctor-patient com- munication, 46 cases received TTT combined EVI (the combined group), while the remaining 40 patients received EVI only (the EVI group). The documents regarding treatment period, follow-up and imaging were compared between the two groups. [Results] Although the combined group consumed significantly longer operation time than the EVI group [(116.4±11.1) min vs (88.1±13.4) min, P<0.05], the former proved sig- nificantly superior to the latter in terms of hospital stay [(21.5±4.0) days vs (24.7±4.5) days, P<0.05], local debridement times [(1.4±0.5) times vs (2.3±0.9) times, P<0.05] and longevity of antibiotic use [(14.5±3.7) days vs (21.2±3.4) days, P<0.05]. All patients in both groups were followed up for (18.8±4.3) months on a mean. The combined group was significantly better than the EVI group in terms of time to re- sume full weight- bearing activity [(5.0 ± 1.6) months vs (6.6 ± 2.2) months, P<0.05], wound healing time [(4.2 ± 1.8) months vs (5.6 ± 2.7) months, P<0.05], wound healing rate (92.9% vs 76.3%, P<0.05) and final amputation rate (13.0% vs 35.0%, P<0.05). The pain VAS score, self-perceived VAS score and local lesion grade significantly improved in both group over time (P<0.05), which were not statistically signifi-cant between the two groups before surgery and one month after surgery (P>0.05), while became statistically significant between the two group 3 months after surgery and at the last follow-up (P<0.05). As for imaging, vascular imaging presentations in both groups was signifi- cantly improved over time (P<0.05), which was no significant difference between the two groups preoperatively (P>0.05), whereas in the com- bined group was significantly better than that in the EVI group at all corresponding time points after surgery (P<0.05). [Conclusion] This tibial transverse transport combined with endovascular intervention does considerably improve the therapeutic effect, is an effective and safe treatment for severe arteriosclerosis obliterans of the lower extremity.