The life span of adult roundworms is usually 6-12 months, so roundworms can survive in the body for six months to a year. Ascariasis is a very common parasitic disease, commonly found in preschool children, and can be caused by the ingestion of infective roundworm eggs. Patients with ascariasis can suffer from pain around the umbilicus, loss of appetite, diarrhea, constipation, etc. Children often suffer from salivation, teeth grinding, malnutrition, and in severe cases, ascariasis intestinal obstruction. Patients suffering from ascariasis should be treated with deworming drugs, and the more commonly used deworming drugs are mebendazole, prothiimidazole and other drugs. In addition, to prevent roundworm disease, first of all, we should develop good hygiene habits, wash hands before meals and after stools, do not eat unwashed vegetables and fruits, and do not drink raw water to prevent the intake of roundworm eggs, which can reduce the chance of roundworm disease.