The objective of this research is to insist on the most important symptoms and signs of appendicitis and diagnosis in a timely manner to avoid complications and deaths. The aim of the study was to establish diagnostic criteria for acute appendicitis in children in the light of the data obtained from the study of a large number of patients with appendicitis and to determine the surgical indication to reduce complications and negative abdominal opening and to include the studied criteria in a spec ial scale in our patients to evaluate children with acute appendicitis depending On this scale. The study included 104 children who visited the Pediatric emergency department at Al-Assad University and University Hospital and Tishreen university Hospital with a complaint of abdominal pain between 2014 and 2016. The number of male patients was 76 patients and 28 females, abdominal pain was present in all patients, The following criteria were studied (abdominal pain, abdominal tenderness, rebound tenderness, ultra sound, leukocytosis, shift to left, fever,crp). These criteria were studied to diagnose acute appendicitis and to put them in a special scale for use in diagnosis or denial acute appendicitis. In comparison with international standards, we observed that the scale studied in our study is more objective and eliminates the subjective factor in the diagnosis of appendicitis.