Child 6 years old neutrophils 0.95 × 10^9 / L low, consider neutropenia, find the cause of the disease, treat the primary disease, prevent secondary infection. 1. Treatment of primary disease: drug-induced granulocytopenia, stop the drug immediately. If exposed to radioactive substances, chemical poisons, etc., pay attention to good isolation. If it is caused by hypersplenism and often recurrent infection, splenectomy can be done. 2. Prevent secondary infection: patients without fever, no obvious infection, should not be hospitalized to avoid nosocomial infection. Avoid damage caused by skin mucosa, which can easily cause bacterial infection. Don’t abuse antibiotics, and do a good job of indoor disinfection. 3. Blood transfusion: fresh blood or white blood cells can be transfused when granulocytes fall sharply to assist the body to control the infection. 4. Granulocyte colony-stimulating factor, which helps to improve symptoms and reduce mortality from infection. 5. Hematopoietic stem cell transplantation: hematopoietic stem cell transplantation can be used if recurrent severe infections are resistant to granulocyte colony-stimulating factor. Children with neutropenia, timely hospitalization to identify the cause of the disease, and then treatment.