Seven-year-old children with brain injury have poor intelligence. In the acute stage, it is necessary to take the child to the hospital to treat the original disease, symptomatic treatment, and nutrition of the nerves; in the recovery stage, it can be treated by rehabilitation exercises and hyperbaric oxygen. 1. Acute stage of brain injury: take the child to the hospital in time to treat the symptoms of brain injury and reduce the sequelae. For example, for infectious injury, control the infection; for intracranial hemorrhage, use hemostatic agent such as tranexamic acid, and in serious cases, surgical treatment is needed; use nerve-nourishing drugs such as piracetam and cerebral protein hydrolysate injection. 2. Recovery period of brain injury: the child’s life skills can be improved through functional exercises, such as physical exercise training, skills training, language training, etc., and the use of hyperbaric oxygen to nourish the cerebral nerve treatment. Seven-year-old children with brain injury have poor intelligence, need to take the child to actively treat the primary disease, take the child to the hospital rehabilitation training treatment.