Slow waves of brain waves of normal intelligence are normal in children and adolescents younger than 14 years of age. Adults with normal intelligence may also experience more slow waves during sleep, while slow waves during wakefulness are abnormal. Intelligence is very normal brain wave slow wave is mainly divided into the following two kinds: diffuse slow wave and focal slow wave. Diffuse slow waves are mostly seen in diffuse brain damage, such as hypoxic-ischemic encephalopathy, meningitis, demyelinating encephalopathy, and central nervous system degenerative diseases, etc. Focal slow waves are mostly seen in epidural or extradural hematoma, herpes simplex virus encephalitis, focal epilepsy, or brain abscess. Intelligence is very normal brain wave slow wave patients, need to go to the hospital in time for medical examination, through the cranial magnetic resonance examination, cranial CT examination, lumbar puncture examination, etc. to clarify the cause, symptomatic treatment.