Abstract: [ Abstract] Objective: To explore the application of the flap supported by SMAS （superficial muscle aponeurosis system） pedicle for the immediate repair of the facial soft tissue defect after accident. Methods: The flap supported by SMAS pedicle were designed at the edge of a facial subregion and were used for the immediate repair of the facial soft tissue defect after accident. The biggest area of the transplanted flaps was 7.5cm ×4.5 cm. Results: All transplanted flaps survived well without any obvious complications，and were all matched with the surrounding tissue in texture and colouration.The donor-site incision lines were obscured， facial contour and appearance were good , and cosmetic results were satisfactoring. Conclusions: Based on the principles of facial aesthetic subregions ,use of the flap supported by SMAS pedicle with sufficient blood supply is easily completed and is an ideal choice in immediate repair of a middling or small areas of facial soft tissue defect after accident

Key words: Superficial muscle aponeurosis system, Surgical flaps, Skin transplantation, Facial soft tissue defect