The process of general anesthesia for surgery needs to be carried out in conjunction with the surgical operation as well as the basic condition of the patient. General anesthesia is the abbreviation of general anesthesia, is a common form of anesthesia, through the respiratory tract inhalation of anesthetic gas or intravenous injection of anesthetic drugs, prompting the patient to temporarily lose consciousness, unable to perceive pain, so as to help the doctor to complete the surgical operation. Before the surgery, it is necessary to choose the appropriate general anesthesia method according to the surgical operation and the patient’s individual situation. If the operation is small, for example, painless gastric polypectomy, painless intestinal polypectomy, etc., the doctor can be helped to complete the operation through a short period of intravenous drug. If the surgical operation is large, for example: gastric cancer, intestinal cancer patients undergoing radical surgery, etc.. The operation time is relatively long, and anesthesia risk assessment needs to be carried out for the patient before the operation. During the anesthesia process, it is generally necessary to first inhale the anesthetic gas, then tracheal intubation, use the ventilator to assist respiration, and then combine with the intravenous use of anesthetic drugs, in order to complete the general anesthesia of the surgical process. Intraoperative close observation of the patient’s basic condition is required to regulate the anesthetic medication and ensure surgical safety.