Wound or postoperative pain stimulation, bring physical pain and psychological burden, but also can increase the patient’s gastrointestinal function, cardiorespiratory dysfunction, causing a variety of complications, seriously affecting the patient’s postoperative recovery. And postoperative pain relief carried out to be able to improve this situation. First, oral pain medication, some of the local anesthesia can be completed under minor surgery, because the trauma is relatively small, you can choose this method. Second, intramuscular injection of painkillers, which is a conventional post-surgical pain relief method for patients who need to continue to eat after surgery, the advantage is that the pain can be relieved very quickly and last for a period of time. The advantage is that the pain can be relieved quickly and last for a period of time. The disadvantage is that the pain-relieving effect of the medicine will be weakened or disappeared soon, and the pain will still be felt later. Thirdly, intrathecal analgesia, which is a pain-relieving drug injected into the spinal canal at one time or in several times to block the conduction signals of pain sensation and achieve the purpose of analgesia. Once the drug can be maintained for a certain period of time, multiple times the drug will need a special apparatus or catheter left in the spinal canal. Fourth, analgesic pump pain relief, which refers to the use of machines or pumps for automatic or manual administration of pain relief methods. This type of pain relief can be completely self-controlled or controlled by the physician. The physician sets the basic data and safety mode, or additional drugs in the safety mode to meet their own needs for pain relief. Analgesic pumps, in this way, clinical applications are now becoming more widespread.