Preoperative needle clinically there are two main categories: First, antibiotics, generally half an hour before the operation of intravenous drip, preoperative use of antibiotics can effectively prevent patients from intraoperative, postoperative abdominal cavity or incision infections, generally selected cephalosporin II class of antibiotics for anti-infective treatment, such as cefamandole, cefmetazole, cephalexin and so on. Second, anesthesia drugs, preoperative anesthesia drugs can reduce the anxiety of patients through the effect of sedation, preoperative use of anesthesia drugs with analgesic effect, which can make patients cooperate with the appropriate anesthesia position, and achieve good anesthesia effect. Preoperative application of anticholinergic drugs can inhibit the secretion of the patient’s glands, which is conducive to maintaining the smoothness of the airway, avoiding the accumulation of phlegm to block the airway, causing the patient’s asphyxiation.