Pediatric anorexia is a condition characterized by a longer-term loss of appetite or lack of appetite, with symptoms such as avoidance of food and drink, weight loss, and gastrointestinal dysfunction. Pediatric anorexia may be caused by a variety of factors, the main symptoms are changes in eating habits, eating less, skipping meals, there is a primary disease in children may be accompanied by diarrhea, constipation, abdominal pain and blood in the stool, often avoid eating, gastrointestinal dysfunction, eating difficulties, weight loss, and the presence of body image disorders, the delayed development of secondary sexual characteristics. The treatment of pediatric anorexia nervosa is complex and needs to be based on the etiology of the disease, while paying attention to the psychological, social, family education, and even interpersonal relationships of the affected child for comprehensive treatment. Daily attention should be paid to a balanced diet and to correcting the cognitive bias of the child towards his/her own weight.