Artificial joint replacement is the best treatment for end-stage hip and knee diseases, which can effectively relieve joint pain, correct joint deformity, restore joint function, improve the quality of life, and allow patients to enjoy life better! Clinically, many patients and their families are concerned before and after surgery about “how many years will the replacement joint last?” Here, we would like to analyze the situation. Here, we would like to analyze the factors that affect the service life of artificial joints. While the material of the artificial joint and the surgeon’s surgical technique are important factors that affect the service life of the replacement joint, the maintenance of the artificial joint after the replacement deserves the attention of the patients. First, patients should pay attention to weight control after surgery. Overweight, the artificial joint is like an overloaded truck, the wear and tear of the joint prosthesis will accelerate, and its service life will naturally be shortened. Secondly, appropriate exercise should be chosen. Patients after joint replacement can usually walk, swim, ride a bicycle, play gateball and other exercises, but should avoid strenuous confrontational activities, less climbing, less climbing, less squatting, in order to reduce the wear and tear of the artificial joint prosthesis. Again, post-arthroplasty patients should pay special attention to fall prevention. Older patients have weaker muscles and are more likely to fall; at the same time, most older patients have osteoporosis and are more likely to fracture after a fall. If a patient with a joint replacement slips or falls, a periprosthetic fracture can easily occur, resulting in joint replacement failure and the need for early revision surgery. This is a common occurrence in my clinical work, which is a pity. Recent studies have found that low serum 1,25-dihydroxyvitamin D levels in the elderly are a cause of falls. Patients should pay attention to active vitamin D supplementation, because vitamin D can promote intestinal absorption of calcium, thus increasing bone density and facilitating the treatment of osteoporosis; at the same time, vitamin D can improve muscle strength and mobility of patients, which can help prevent falls and thus reduce the risk of fractures.