Three-year-old children appendicitis is divided into chronic, acute, acute attack of chronic appendicitis, the treatment is mainly divided into conservative treatment and surgical treatment, conservative treatment for active anti-infection, adjusting dietary habits, etc., in order to prepare for surgical treatment, if the conservative treatment is ineffective, need to carry out timely surgical treatment. At present, the clinical treatment principle for appendicitis is: appendicitis once diagnosed, are recommended to early surgical treatment. 1 chronic appendicitis: mostly as a result of conservative treatment, and ultimately may be repeated inflammation of the appendix leading to increased difficulty in the later stages of surgical treatment, so chronic appendicitis attack, under the guidance of the doctor to use antibacterial drugs, such as cefotaxime, cefuroxime, etc., inflammation control as soon as possible after the surgical treatment. 2. Acute appendicitis: mostly for the first attack, the symptoms are more typical, anti-infective treatment and actively prepare for surgical treatment, to avoid affecting the work and life in the future. 3. Acute attack of chronic appendicitis: mostly for the previous diagnosis after temporary conservative treatment, appendix inflammation is temporarily controlled, in some reasons lead to sudden inflammation of the appendix caused by this case than the first two treatments are more complicated, anti-infective due to repeated use of drugs to produce drug-resistant and poor efficacy, due to the repeated inflammation of the local surgery caused by serious adhesions, increasing the difficulty and risk of surgery. In conclusion, when appendicitis is diagnosed in a three-year-old child, anti-infective treatment should be carried out under the guidance of a doctor and surgery should be actively prepared. In addition, the symptoms of appendicitis in children are atypical, and abdominal discomfort requires prompt medical attention to avoid the deterioration of appendicitis and the emergence of perforation and other serious complications.