The precautions for external fixation of small splints include: 1. Elevate the affected limb appropriately. Lying down should be more than the heart, the upper limb should be suspended by 90° elbow flexion, and the lower limb should be placed on a pillow or lower limb pad to elevate the lower limb, which is conducive to blood circulation and the subsidence of the affected limb swelling; 2, close attention should be paid to the blood flow and sensation of the fixed limb, to prevent compression of blood vessels and nerves, which will result in serious complications; 3, when the hip joint is fixed, the parts of the bony prominence that are pressed by the splint are also protected with pressure pads, because if the pressure is prolonged, there is less subcutaneous tissue and less muscle, which is easy to produce skin pressure sores. Because if the pressure for a long time, the bone protrusion part of the subcutaneous tissue is less, less muscle, easy to produce skin pressure ulcers, resulting in serious complications; 4, after the splint is fixed, we should adjust the tightness of the tie in time. Because after fixation, the limb may appear swelling, swelling may also subside, if the swelling is aggravated, it is necessary to less slack, if the swelling subsides, it is necessary to tie tight. Fixation to the tie with 1cm up and down for degree; 5, after fixation, to encourage patients to appropriate limb functional exercise, promote fracture healing; 6, to timely review, dynamic observation of the location of the fracture, to determine the growth of the bone scab, to prevent the fracture re-displacement.