The basic drug for cancer pain treatment is an opioid, such as morphine. Standardized use of opioids for pain management is not addictive. Pain is an effective antagonist of morphine addiction. Oncology patients have severe pain, and the reasonable use of opioids can effectively relieve pain and clinical symptoms without morphine addiction. A large number of clinical data show that in cancer pain patients, with a standardized use of opioids, although the use of opioids in the world has increased, the proportion of morphine addiction or addiction has decreased instead. The standardized use of opioids for pain management is not addictive.