[Objective] To evaluate the efficacy of two kinds of osteotomy on tibial lengthening for leg discrepancy in sequelae of poliomyelitis. [Methods] From March 2008 to July 2017, 50 patients were performed tibial lengthening procedures with tibial metaphyseal osteotomy and tibial shaft- metaphyseal osteotomy. We use the tibial lengthening, percentage of increase, the distraction index, bone healing index and lengthening procedure complications to evaluate the results in this study.[Results] All patients were available for an average duration of follow-up of 4 years. Tibial metaphyseal transverse osteotomy: the mean tibial lengthening was 4.05±1.17cm,the? mean percentage of increase was 0.139士0.046, the mean distraction index was 13.69±1.58days/cm, and the mean bone healing index was 53.91±4.38 days/cm. Tibial shaft- metaphyseal inverted-V osteotomy: the mean tibial lengthening was 4.07±1.22cm, the mean percentage of increase was 0.144士0.038, the mean distraction index was 13.78±1.79 days/cm, and the mean bone healing index was 51.22±6.40 days/cm. In the tibial shaft- metaphyseal inverted-V osteotomy group, the axial deviation occurred in one cases, the knee flexion contracture occurred in one cases. In the tibial metaphyseal transverse osteotomy group, the axial deviation occurred in four cases, the knee flexion contracture occurred in six cases. There was a significant statistical difference between the two groups. [Conclusion] Two kinds of osteotomy methods on tibial lengthening for leg discrepancy in sequelae of poliomyelitis all can obtain satisfactory lengthening effect, but tibial shaft- metaphyseal inverted-V osteotomy results in a less the axial deviation occurred and the knee flexion contracture, shorten bone healing time.