Patient:Zhao# Male 45 years old, Dongusu Village, Aguitu Township, Houqi, Ulanqab League, Inner Mongolia, was transferred to our hospital after surgery in a local hospital for a car accident injury. Li Chang, Hand and Foot Microsurgery Clinic, Second Affiliated Hospital of Inner Mongolia Medical University, discussed: 1. The posterior tibial artery supra-ankle skin branch flap can be covered posteriorly to the outer ankle. 2. The free fibula graft with good blood flow has a rapid bone replacement effect.