With the development of modern medicine, many new drugs as well as new treatment methods can make cancer pain patients suffer less from cancer pain. The principle is three-step treatment, which emphasizes firstly oral drugs, secondly, slow-release drugs must be given on time, and again, drugs should be administered according to the step, which needs to strictly grasp the principle of pain relief and pay attention to individualized differences. Recently, some minimally invasive treatments can be used to reduce patient pain, including nerve destruction, so that patients do not feel pain and do not affect their quality of life, and intrathecal pump implantation, which is a very small program-controlled pump to pump a drug into the subarachnoid space, so that the patient originally used a large number of drugs to produce side effects do not exist, and produce hundreds of times the effectiveness of oral drugs or intravenous drugs, so that the patient’s pain is instantly reduced to a minimum. The patient’s pain is instantly minimized. There is also spinal cord electrical stimulation which is very effective for some intractable pain.