Osteoporosis is characterized by reduced bone mass, normal chemical composition of bone tissue, degenerative microstructure and increased risk of fracture. Its clinical manifestations are weakness, low back pain, bone pain and bone deformation. In the early stage, there may be no obvious conscious symptoms, and it usually creeps into the body slowly and quietly without being noticed. Only when the bone loss reaches 30%, hunchback and general shortening may occur, and many patients often suffer from osteoporotic fractures as a result. Osteochondrosis is divided into two main categories: primary osteoporosis and secondary osteoporosis. Secondary osteoporosis is often induced by certain diseases or certain causes, primary osteoporosis is a physiological change in bone tissue due to increasing age or after menopause in women, and there is an idiopathic osteoporosis of unknown cause, which occurs not in old age but in young adulthood or adolescence, and this case is mostly in genetic families. However, whether congenital or acquired, primary or secondary, it is closely related to calcium deficiency. The usual rare sunlight or liver and kidney disease, the body can not produce l.25-dihydroxyvitamin D, affecting calcium and phosphorus metabolism, menopausal women estrogen reduction, the elderly liver and kidney function decline, can make 1, 25-dihydroxyvitamin D production reduced, so these two conditions are particularly prone to cause osteoporosis. Epidemiological surveys in China in recent years have reminded people to pay great attention to osteoporosis caused by postmenopause in women and osteoporosis in elderly men. Due to the lack of treatment for osteoporosis, and the occurrence of fractures is difficult to recover. Therefore, prevention of osteoporosis is more important than treatment. Most studies have shown that after age- or menopause-related bone loss, increased calcium supplementation only serves to reduce bone loss and maintain bone mass levels, but does not provide a more sustainable increase in bone mass. And to reduce the incidence of osteoporosis, scholars generally agree that obtaining the genetically specified maximum peak bone mass through proper nutrition and exercise in the pre-life period (childhood, adolescence, and early adulthood) is the best measure to prevent osteoporosis later in life. The problem of insufficient calcium intake in our population is more prominent, and the important reason for the generally low calcium diet is the improper food mix, various dietary structures are unreasonable, the main source of calcium in food is plant food, dairy products are rare, therefore, pay attention to change the current improper dietary habits, advocate eating more calcium-rich foods (such as milk, fish, shrimp, soybeans, tofu, etc.), and can ensure sufficient vitamin D through food or sun exposure Vitamin D, regular exercise, in order to effectively prevent osteoporosis.