1, position: supine position, flexion of the hip and knee, N fossa under the pillow. 2, needle knife operation: peroneal long and short muscle injury is generally set at 1 to 3 points on the lateral surface of the fibular head and fibula. The long fibular muscle injury is mostly fixed in the lateral surface of the fibular head and 2/3 of the lateral surface of the fibula, and the short fibular muscle injury is mostly fixed in the lower 2/3 of the lateral surface of the fibula. After routine disinfection, the incision line is aligned with the longitudinal axis of the limb, the body of the knife is perpendicular to the skin surface, and the skin is pierced quickly and the bone surface is reached slowly. Avoiding the nerve, 2-4 cuts are made to the contracted hard and tough tissue, longitudinal sparing and transverse stripping. The needle is discharged after a feeling of loosening under the knife. Local pressure is applied and a band-aid is applied externally. Peroneal long and short muscle injury treatment should be slow when entering the needle, the patient should not panic when there is electrocution-like, should slightly lift the needle knife, the needle body direction to the side at a certain angle and then slowly into the needle. Generally do not cut transversely to prevent severing the superficial peroneal nerve and deep peroneal nerve.