[Abstract] Objective To investigate the surgical methods and clinical effects of repairing the soft tissue defects of the heel by using the tissue flap straddled donor area of the posterolateral lower leg. Methods On the basis of anatomical study of traditional sural neurotrophic flap and radial perforator flap, 9 cases of large-area heel skin composite soft tissue defect were reconstructed and reconstructed. Results 9 cases of large soft tissue defects in the heel were repaired. The composite flap survived without infection and necrosis. The postoperative function was good and the donor area was good. After 12 months to 3 years of follow-up, the patient walked normally. The function of the foot was assessed according to the American Society of Orthopaedic Foot and Ankle (AOFAS) foot scoring criteria. Nine patients were excellent in 7 cases and good in 2 cases. Conclusion The new trans-donor composite tissue flap is a new and effective method for repairing large-area skin tissue defects in the ankle and foot. The functional shape is satisfactory. Key words sural neurotrophic flap; radial artery perforator flap; heel reconstruction; reconstruction