There are statistics in the literature that 30% of seniors over the age of 65 and 50% of them over the age of 80 have experienced a fall every year, and the elderly with osteoporosis are more afraid of falling because it can directly lead to some serious fractures, such as hip fractures. As the old saying goes, it takes a hundred days to break a bone, so think about what it’s like to be in bed for a hundred days, not to mention the pain all over your body and the trouble your family has to deal with. But the fact is not entirely true, sometimes not pay attention to the certainty of not falling, sometimes fall is not by their own decision, some elderly people will be left foot will trip the right foot a fall, once encountered an old man, when the elevator door open open, one foot across the door, the door closed when the other foot but mixed, sitting on the ground, the femoral neck fracture, in bed for three months, can no longer walk independently. A study of 30 cases of patients who fell in the hospital revealed that the falls were dominated by fainting and lower limb weakness. There were fainting (14 cases) and lower limb weakness (13 cases) (46.67% and 43.33%, respectively), followed by 2 cases of slip (6.67%) and 1 case of trip (3.33%). Therefore, there are many reasons for the elderly to fall, and only by paying attention to these reasons can we avoid falling. Reason one: the relationship of ageing, due to ageing various body functions have changed significantly: the control of the central nervous system, vestibular sensory ability decreases, resulting in the elderly reaction time is prolonged, the balance is unstable, increasing the risk of falls, research shows that there is a relationship between the balance of elderly patients and falls. Reason 2: Due to sickness taking some drugs, the elderly due to poor kidney, some drugs excreted more slowly, easy to gather in the body, for example, many people have high blood pressure, diabetes, insomnia, long-term use of antihypertensive drugs, hypoglycemic drugs, sedative, hypnotic, anti-anxiety, antidepressants, etc., after the use of drugs, in addition to possible side effects such as hypoglycemia, hypotension, while the side effects of drugs also tend to cause elderly patients The side effects of medication may also cause the elderly patients’ balance, gait instability, visual impairment, slow reaction, etc. and lead to falls. Reason 3: Because of the declining function of the skeletal muscle system and lower limb muscle strength in the elderly, resulting in weakened muscle and joint function and reduced mobility, falls due to gait instability and lower limb weakness account for a larger proportion of the total number of falls in the elderly. Reason 4: Psychosocial factors and falls have a certain connection, some older people are afraid of falling, especially those who have fallen before will be more afraid of falling, walking more carefully, can not walk as far as possible, which in turn lost the opportunity to exercise, muscle strength and coordination ability decreases in the long run, increasing the risk of falls. Reason 5: Some elderly people have strong personalities, stubbornness and independence, and tend to ignore the various risk factors for falls. Reason 6: In terms of environmental factors, the elderly are prone to slip and trip, which reminds us to pay attention to the safety environment settings to reduce the risk of falls among the elderly. Here we focus on the problem of muscle strength of the elderly, it has a great relationship with a vitamin, research found that supplementation of this vitamin can reduce the elderly fall, increase muscle strength and muscle coordination, this vitamin is vitamin D. Some people may say: only heard that children and pregnant women need to supplement vitamin D, did not know that the elderly also need to supplement, yes, now it is found that vitamin D can not only promote the small intestine It is found that vitamin D can not only promote the absorption of calcium in the small intestine and prevent osteoporosis, but also has many other roles, such as it can increase muscle strength and muscle coordination, and vitamin D supplementation can significantly reduce the risk of falls, while the ability of the elderly to form vitamin D in the skin is equivalent to 75% of that of young people, which requires oral vitamin D. These vitamin D needs to be activated in the liver and kidneys to become active vitamin D in order to work, and the elderly often This makes us walk strongly, and although we can’t walk as fast as we can, we can do it without stumbling. In conclusion, falls in the elderly are the result of a combination of many causes, and cannot be attributed to the fact that the elderly do not pay attention and fall, but to the fact that falls are not their subjective behavior, but there are many objective factors, such as environmental factors, reduced muscle strength, uncoordinated walking, and the use of certain drugs can cause falls. So how to prevent falls? Such as using soft lighting facilities indoors, preferably with night lights and easy to reach power switches; indoor furnishings should be convenient for the elderly to use, easy to reach and not restricted; the floor should be flat, try to use wooden flooring, outdoor and indoor smooth material flooring, should be kept dry; clothing to wear and take off appropriate, bathing can use the seat to prevent slipping, so that the possibility of falling is minimized. Vitamin D supplementation; balance practice, gait and strength training, attention to outdoor exercise, maintain an optimistic attitude, reduce the fear of falling, and improve the quality of life.