Contracture is a condition in which a muscle or joint is in a state of spasticity or in a specific position for a long time, resulting in muscle atrophy, joint deformation and immobilization, which in turn causes dysfunction of the body and localized pain. Although the disease is common in the elderly, but the child patients are also there. So for children, how do we prevent ischemic contracture of forearm and hand muscles? 1, immediately eliminate the cause of the injury: there is displacement of the humerus epicondylar fracture or other parts of the fracture immediately reset, generally take manipulation reset plus Kirschner’s pin bone traction, and compare the operation before and after the radial artery pulsation change situation. 2.Pre-operative preparation: because of the seriousness of the consequences of the brachial artery injury, to gain time is the first and foremost condition to obtain the best results. Under this premise, clinicians should make preparations for surgical exploration and treatment while taking various effective measures in order to minimize complications. 3.Surgery should maintain smooth blood flow: due to the importance of the brachial artery to the distal blood supply, the surgery must be thorough, and should not take a palliative attitude towards the damaged blood vessels, especially those with endothelial or elastic lamina involvement, and should be decisive when saphenous vein transplantation or other blood vessels are needed, and pay attention to the vascular anastomosis technique and strive for perfection, in order to ensure the smoothness of the blood vessels. 4, taking into account the treatment of fracture: because the cause of brachial artery injury is mostly due to the corresponding segmental humerus fracture, therefore, in order to avoid 2 injuries, the fracture localization should be dealt with at the same time. In general, open reduction and internal fixation are the first choice of treatment. 5.Attention to postoperative treatment: Because of the complexity of the anatomical relationship of the site, especially the position of the elbow joint and the upper limb fixation methods and methods of choice, therefore, in the resumption of blood flow in the brachial artery, attention should be paid to the observation of vascular patency, and more attention should be paid to postoperative treatment should be avoided to affect the vascular patency of a variety of factors, especially supracondylar fracture of the humerus after the reset of the displacement of the humerus artery will be a common reason for the damage to the brachial artery again. The following are some of the common causes of re-injury of the brachial artery.