Surgical drain removal time needs to be judged according to the patient’s condition. If the patient is doing cholecystectomy, it can be removed 3 days after the operation; if the patient is doing digestive perforation, it needs to be able to eat normally and have regular bowel movements for 2-3 days before removal; if it is a T-tube, it needs to be removed after 2 months after the operation when there is no abnormality on the contrast examination. 1. Cholecystectomy: The purpose of placing a drain in cholecystectomy is to drain the residual blood or tissue fluid during the operation, and the drain is removed after the drainage flow is less than 20ml and the color of the fluid becomes clear, usually about 3 days after the operation. 2. Gastrointestinal perforation: In order to avoid fistula or non-healing situation after gastrointestinal perforation, it is necessary to wait until the fistula is healed and the patient eats normally and has regular bowel movements for 2 to 3 days before removing the drainage tube. 3. T-tube: for example, the T-tube in the common bile duct, 2 weeks after the operation to observe the high hanging, clamping no reaction, 2 months after the injection of contrast medium did not see no abnormality, you can remove the T-tube. The timing of surgical drain removal depends on the location of the drain, its purpose, and the patient’s recovery. If the patient is uncomfortable with the placement of the drain, inform the doctor for prompt treatment.