The purpose of plastic surgery treatment for diabetic foot is to promote ulcer healing and close the wound, which mainly includes debridement and drug exchange (VSD technique), skin implantation and flap transfer, etc. 1. Local trauma treatment. Debridement is a crucial treatment for patients with chronic ulcers in diabetic foot. The purpose of debridement is to remove scarring, necrotic tissue and dead bone. Patients with a higher frequency of debridement have a higher rate of wound healing, and the healing of ulcer wounds can be promoted by debridement and drug exchange. However, the traditional clean dressing changes after debridement are painful for patients and have a long and costly course. negative pressure closed drainage (VSD) technology addresses the shortcomings of traditional methods. VSD promotes wound healing through several mechanisms: continuous negative pressure removes fluid and sources of infection from the wound, effective closure reduces cross-infection, and protects the wound environment; promotes blood perfusion and granulation tissue growth. It stimulates the expression of multiple pro-healing genes and repair signals, promotes the proliferation and release of multiple growth factors and enzymes on the wound surface and periwound, and promotes epithelial regeneration; reduces periwound tissue edema and enhances material exchange between the wound surface and periwound. The healing of the trabecular surface and the periwound area are better integrated together, thus promoting faster and better healing of the trabecular surface. The ideal implant wound should have healthy granulation tissue and good blood flow. Skin grafting can be used to cover ulcerated wounds in the larger dorsal area of the foot or non-weight-bearing area of the sole, closed donor wounds after flap transfer and direct grafting on blood-rich muscle flaps. In addition to autologous skin grafting, with the development of tissue engineering technology, there has been mature tissue engineering skin used for the treatment of diabetic foot ulcers with good efficacy. 3, the skin flap has the characteristics of good blood flow, wear resistance, strong resistance to infection, and can cover the trauma with bone exposure and tendon fascia exposure, etc. Therefore, it is often used as the preferred way to cover the trauma of diabetic foot. The flap can be divided into local flap, adjacent or distant flap, and free flap according to the position of the flap and the trauma. With the development of microsurgery technology, the use of flaps to repair diabetic foot wounds can maximize limb salvage, reduce the disability rate, and improve the quality of life of diabetic foot patients.