The invention discloses an external fixing frame. The external fixing frame comprises a traction plate and a traction needle fixedly connected with the traction plate, and further comprises a thread transmission mechanism which is fixedly connected with the traction needle and drives the traction needle to move in the axial direction. When the external fixing frame is used, a periosteum is stripped under a tibia tuberosity of a patient, a small bone block is cut out, the periosteum on the surface of a tibia is protected, firstly, the traction plate is arranged between the cut tibia bone block and the periosteum on the surface of the tibia, then, the traction needle is connected with the traction plate and the bone block, finally, the thread transmission mechanism drives the traction needle to move in the axial direction of the traction needle. Therefore, by driving the traction needle and the traction plate to move, the periosteum is pulled while the bone block is pulled, so that vasculature neogenesis at a shank part can be promoted, neovasculature can be established, nutrient blood at the shank part can be increased, and then natural healing of a diabetic foot wound surface is promoted.