Cancerous visceral pain is very common in patients. Patients often lack clear expression of the nature of the pain, but it is more uncomfortable. According to the World Health Organization (WHO), there are 10 million new cancer patients and 6 million deaths from cancer worldwide every year, 50% of them have cancer pain symptoms, and 70% of advanced cancer patients have pain as the main symptom. Among the pain patients, 50% to 80% of pain is not effectively controlled due to various reasons. Currently, the number of new cancer patients in China is about 1.8 million per year, and the number of people who die from cancer reaches 1.4 million per year. Research shows that the incidence of cancer pain patients in China is as high as about 50%, and the cause of pain is directly caused by tumor which takes the 1st place about 80%, while the treatment of tumor can also cause pain, and the incidence is about 10%. The other 10% are tumor-related or unrelated causes. Prognosis: For patients with potentially curable cancer, exact and effective pain relief can significantly improve the general condition of patients and enable them to successfully complete clinical radiotherapy, chemotherapy and other anti-tumor treatment plans to achieve the purpose of cure. For patients who are difficult to cure, effective pain relief can enable them to obtain a more comfortable survival with tumor, improve their quality of survival, and possibly prolong their survival period. In fact, it is entirely possible to make cancer patients pain-free or to minimize pain to a tolerable level. According to the information published by WHO, the use of pain medication alone can provide varying degrees of pain relief in 90% of cases. Prevention: Strengthening the prevention and treatment of tumors is the fundamental way to prevent the development of cancer pain.