Objectives: comparing surgical outcomes of early and late oral feeding in children undergoing intestinal anastomosis. Participants and major eligibility criteria: 66 children aged one month to 12 years in the Imam Reza hospital in Kermanshah are undergoing intestinal resection-anastomosis will be studied; Exclusion criteria included underling diseases, septic shock, severe postoperative ileus (abdominal distention with vomiting), a large difference in size between two ends of the bowel during surgery, complicated surgery, anemia and lack of consistency between weight and age. Design and interventions: In this randomized clinical trial, before surgery, patients are randomly assigned to one of the following groups:In the early feeding group, at first day water and serum dextrose and 2 days after surgery, oral intake of milk and other liquids will begin. In late feeding group, at second day total parental nutrition (TPN) will begin and 5 days after surgery, patients will begin a liquid diet. If appropriate tolerated liquid diet, regular diet gradually will begin. Main outcomes: Patients during the hospital stay will be visited every 12 hours. Duration of hospital stay, time to first defecation and complications after surgery (postoperative fever, nausea, vomiting, abdominal jugular, pneumonia, infections and open incision site) and the cost of hospital patients in both groups will be compared.