Lead poisoning in children mainly manifests itself in gastrointestinal dysfunction, neurological symptoms, changes in the blood system, urinary system and so on. 1. Gastrointestinal dysfunction, mainly manifested as abdominal distension, anorexia, and even periumbilical pain, nausea, vomiting, black stool and other symptoms. 2. Nervous system symptoms, lead poisoning may lead to damage of the nervous system, manifesting dullness of sensation and movement, fatigue, dizziness, headache, mental disorders, inattention and so on. 3. Abnormalities in the blood system, lead poisoning in children may cause destruction of red blood cells and hemoglobin and lead to anemia. 4. Urinary system performance, as lead will run with the body blood through the kidney metabolism, causing renal failure, proteinuria, oliguria or anuria, etc., urine routine may also appear creatinine, urea nitrogen significantly higher phenomenon. Lead poisoning in children has a greater impact on health, and should be clarified in time to do the treatment.