Sleep disorders are one of the common medical conditions that plague the elderly. Generally speaking, healthy and long-lived elderly people have a more regular life and sleep well. On the contrary, those who suffer from chronic insomnia are often accompanied by some degree of psychological and physical disorders, which have a negative impact on the body. In recent years, the danger of sleep disorders to the health of the elderly has received more and more attention. In old age, sleep disorders are characterized by shortened effective sleep time, shallow sleep, early sleep and early awakening, difficulty in falling asleep, and increased wakefulness. These characteristics are closely related to the physiological changes, health status and other factors in old age. The occurrence and regulation of sleep is one of the functions unique to the brain and is an active regulatory process, which is considered as an ability like other brain functions. Due to the normal aging of the body and the declining brain function, the regulation of the wake-sleep rhythm is impaired, resulting in a lack of deep sleep and fast-wave sleep and a relative increase in light sleep states. Patients usually have reduced nighttime sleep, discontinuous sleep processes, multiple brief awakenings, reduced sleep efficiency, daytime fatigue, good snooze, and in severe cases, even sleep daytime reversal. The elderly are also a vulnerable group for sleep disorders. Especially those elderly patients who have some kind of acute or chronic organic diseases, episodic insomnia may not do much harm to the body, but long-term chronic or serious sleep disorders can have serious consequences on the health of these elderly people. First, sleep disorders can aggravate existing organic diseases and make their treatment less effective. For example, due to sleep disorders produce irritability, mental and physical fatigue, agitation, anxiety, depression and other disorders, which further affect the stability of cardiovascular and other organ functions, and easily lead to the development of heart rhythm disorders, coronary heart disease and cerebrovascular disease. Sleep apnea syndrome is also one of the common conditions leading to insomnia in the elderly, and the prevalence is also higher in the elderly population. Sleep apnea has been found to be directly associated with the development of cardiovascular and cerebrovascular diseases, sleep rhythm disorders, and sudden sleep death. In addition, sleep apnea is accompanied by hypoxemia, which can further aggravate the damage to brain function and organ function in the elderly. The aging process is closely linked to changes in the quality and quantity of sleep. Difficulties in falling asleep and maintaining sleep and good daytime napping are more common in older adults compared to other ages. 35-50% of people over 65 years of age are frequently afflicted with sleep disorders. The need for sleep in adults does not decrease with advancing age. It is commonly understood that the need for sleep decreases with age, but this is not actually the case. In older adults, sleep cycle rhythm function is affected by changes in the structure and function of the central nervous system, such as neuronal loss and reduced synapses, resulting in decreased sleep regulation, which is related to changes in the brain with advancing age. 24-hour changes in sleep rhythms cause older adults to spend more time in bed and less time actually sleeping. Although older adults are sleeping less at night, the total combined time of frequent daytime naps is equal to the total sleep time of younger adults. Older patients often complain of more frequent nighttime awakenings, difficulty falling back to sleep after waking, or early awakenings. As age increases, the number of sleep awakenings increases and the duration of nighttime sleep shortens, which indicates poor sleep quality. Causes of sleep disorders in the elderly: 1, the elderly with age, cerebral atherosclerosis gradually aggravated, accompanied by cerebral infarction, cerebral hemorrhage, hypertension and other diseases, these diseases can reduce blood flow to the brain, so that brain function and metabolic disorders and cause insomnia. 2, the elderly are suffering from cardiovascular disease, respiratory disease, diabetes, renal insufficiency, rheumatism, cervical spondylosis, etc., these diseases themselves are 3. depression and depressive tendencies can significantly aggravate sleep disorders. 4. changes in the living environment of the elderly, the decline in social status, and the lack of a sense of value can aggravate sleep disorders.