Children with abdominal pain need to be able to be examined under the guidance of a physician. If a child has abdominal pain parents need to take the child to the hospital and the clinician will clarify whether an ultrasound examination is needed based on the child’s specific condition. Ultrasound is non-invasive, non-radioactive, and has a high safety profile, and is generally the preferred adjunctive clinical examination. It can be accompanied by parents and is easily accepted by children. Ultrasound can diagnose a variety of causes of abdominal pain in children as well as differential diagnosis, such as the presence of appendicitis, pediatric pancreatitis, cholecystitis, urinary stones, acute cystitis or intestinal torsion, intestinal obstruction and a series of other diseases that can cause abdominal pain in children, and the ultrasound performance of different abdominal diseases varies. Ultrasound can provide a reliable clinical basis for many cases of abdominal pain where the cause cannot be clearly identified if the child is in the process of development. If the pain is caused by intestinal spasm, ultrasound does not detect the cause of the pain in children and requires clinicians to treat different children according to the different conditions they present with.