Children humerus after the removal of Kirschner’s pin should pay attention to the prevention of incision infection as well as short-term restriction of upper limb activities, etc.. Children with healed humerus fractures after the removal of Kirschner’s pin, pay attention to when the incision is infected, regular dressing changes, if necessary, can be given antibiotics such as cefozoxime to prevent infection. In the early stage of removing Kirschner’s pin, we should pay attention to limiting the activities of the upper limbs, and can use bandages or triangular towels for suspension, to prevent excessive activity wound damage and bleeding. In the period of time after the removal of Kirschner’s pin, the humerus strength has not fully returned to normal, be careful not to lift heavy objects to prevent re-fracture. Children humerus after removing the Kirschner pin precautions, it is recommended to go to the hospital and consult an orthopedic surgeon.