Pediatric anesthesia is a relatively challenging part of anesthesia work and is usually performed by experienced physicians in anesthesiology. Pediatric anesthesia is mainly: sleep + bouts of pain = general anesthesia. Sleep is very important for pediatric surgery because pediatric patients have a high level of fear of surgery and have difficulty tolerating pain and the discomfort caused by the fixed position of surgery, so they need to be given adequate amounts of sedative-hypnotic drugs. Usually the drugs of choice such as imipramine and propofol have been used clinically for a long time and have been shown to have no significant side effects and to wake up naturally. Analgesic drugs are divided into: local anesthetics, central analgesics and inhalation anesthetics. The currently used central analgesics and inhalation anesthetics are injected intravenously or enter the blood circulation through the lungs and take effect. The effect on the brain in this way is transient, and the analgesic effect is produced when the concentration of the drug in the blood reaches a certain amount. When the drug is metabolized, transformed and eliminated, the concentration in the blood decreases, the analgesic effect decreases, and the anesthesia becomes shallow, and the child is awake when the drug is about to be excreted. As soon as the supply of inhalation anesthesia is reduced, the drug is quickly excreted from the exhaled gas, and the child wakes up with the reduced anesthesia. In the process of waking up from anesthesia, the child may be in a trance and drowsy, but it is normal to be able to exhale. The drugs chosen in clinical anesthesia are all drugs with low toxicity, no accumulation and easy elimination, so there is no drug accumulation and little drug residue in the body after anesthesia, and the child naturally returns to the state before anesthesia. Therefore, anesthesia is only a temporary effect on the nervous system of children, and the function of the nervous system will return to normal after the anesthesia.