In the vast majority of cases of acute appendicitis and chronic appendicitis, drains do not need to be placed after surgery. The indication for drain placement after acute appendicitis surgery is due to severe localized exudate and perforation of the appendix causing limited or diffuse peritonitis. The purpose of placing a drain is to drain the intra-abdominal exudate and residual infected fluid to avoid the possibility of accumulation in the abdominal cavity and formation of a residual abscess. After the appendicitis drainage tube is placed, the color, volume and nature of the drainage tube should be closely observed every day after the surgery, and the drainage fluid should be sent for bacterial culture and drug sensitivity test in a timely manner in the early stage, and the use of antibiotics should be adjusted according to the results of the drug sensitivity culture if necessary. If the drainage tube drains less than 20 mL of clear fluid per day, ultrasound can be performed to confirm that there is no residual fluid in the abdominal cavity, and the drainage tube can be removed.