After children’s lower limb fracture, generally before arriving at the hospital, they should take nearby materials such as tree branches, wooden boards, etc. to do temporary fixation to prevent the fracture broken end from moving to injure the nerves and blood vessels, and if possible, they can use ice packs to apply ice to the affected area, which can reduce the swelling and pain of the affected limb. If the open fracture is bleeding more than, then you should take the clothing to be compression bandage, if it is a jet of bright red bleeding, in the suspicion of arterial injury, the proximal end of the wound should be strangled with a belt or rope, and urgently sent to the hospital for treatment. For open fractures with exposed fracture ends, do not return the fracture ends, and send them to the hospital after simple bandaging. Sent to the hospital after the clinician will do the appropriate simple examination, determined that the fracture is timely X-ray, open fracture in the preoperative examination, timely emergency surgical treatment, for serious patients should be timely rescue and other measures.