Acute pain is a newly developed pain with short duration. Postoperative pain refers to the acute pain occurring im⁃ mediately after operation, which is the main problem affecting the early recovery and long⁃term quality of life of patients. In recent years, the number and age of older adults undergoing surgery have been gradually increasing and their complicated physiological chang⁃ es and combined diseases bring about great challenges to the control of postoperative acute pain. This paper briefly describes the gener⁃ al mechanism of postoperative pain and the physiological changes of older adults, analyzes and summarizes their features of pain assess⁃ ment and analgesia intervention, and provides assistance to clinicians for the management of postoperative acute pain in older adults.