Patients with advanced cancer pain often need to take large amounts of oral non-steroidal, weak opioid, and strong opioid analgesics as well as a series of drugs that protect the gastrointestinal tract, promote digestion, and improve the basic condition of the body in order to control pain. It even happens that more analgesics are taken daily than meals are eaten. Large doses of oral analgesics cause a great load on the gastrointestinal tract, central system and respiratory system, and the side effects of oral medications add to the pain of cancer patients who are already suffering from constipation, panic attacks, nausea-tasting capsules and stiff pills, and the inability to sleep, which further lead to a negative attitude toward life, a desire not to eat, and even a pessimistic mood to end life before it is too late. It is extremely painful for the patient himself, and even more torturous for the patient’s family and friends. How to reduce oral analgesics, how to improve the analgesic effect, and how to make patients increase their courage to survive? Intrathecal drug infusion system implantation (both morphine pump) is introduced from abroad to treat severe advanced cancer pain and various chronic intractable pain. This technology is an intelligent implantation of drug (morphine) infusion pump into the abdomen subcutaneously, and direct infusion of morphine into the subarachnoid space through a catheter, and the infusion rate is adjusted at any time using the in vitro program control system to achieve the purpose of pain relief or elimination. The features are: 1. good analgesic effect; 2. greatly reduced side effects; 3. once implanted, lifelong use; 4. professional technicians respond and provide services at any time; 5. greatly improve the quality of survival of patients; 6. relatively easy and simple to operate; 7. say goodbye to high-dose oral analgesics. The indications for intrathecal drug infusion therapy are: 1. cancer pain; 2. intractable pain after back surgery; 3. osteoporotic pain; 4. complex focal pain syndrome; 5. axial trunk pain; 6. other, such as arachnoiditis, postherpetic neuralgia, etc.