Appendicitis preoperative preparation items are more and more complicated, but, in summary, there are the following aspects: 1. Preoperative fasting, that is, do not eat anything or drink anything before surgery. On the one hand, it allows the gastrointestinal tract to get a temporary rest, which is conducive to the absorption of inflammation. The patient will be anesthetized and fasted to facilitate the evacuation of the gastrointestinal tract without the occurrence of intraoperative aspiration. 2, skin preparation, the patient should be scraped before surgery, so as to avoid incisional contamination. 3, the pre-operative examination should be perfect, such as the patient to do electrocardiogram, chest X-ray. If the conditions allow, abdominal CT or B ultrasound can be done to clarify the diagnosis and clarify the extent of the lesion, which is conducive to the operation. 4, antibiotics and anti-infection treatment should be carried out, which is conducive to infection control and post-operative recovery of the patient.