First-aid fixing device for limb trauma

The utility model discloses a limb trauma first-aid fixing device, which belongs to the technical field of surgical nursing and comprises a bottom plate, the upper surface of the bottom plate is rotatably connected with a first shell through a pin shaft, the upper surface of the bottom plate is fixedly connected with two supporting plates, and the surfaces of the supporting plates are rotatably connected with rotating shafts through bearings. A straight gear is fixedly connected to the surface of the rotating shaft, a first connecting block is fixedly connected to the top of the first shell, a rack is rotatably connected to the inner wall of the first connecting block through the rotating shaft, a first limiting plate is fixedly connected to the upper surface of the bottom plate, and the rack is slidably connected to the interior of the first limiting plate. A second handle is rotated, a rotating shaft drives a straight gear to rotate under the action of a bearing, the straight gear is matched with a rack, a