Hemodialysis needs to be done for a long time, and it needs to be done for life. Hemodialysis is mainly for patients with uremia, which needs to be done three times a week for four hours each time. Uremia is the end stage of many kidney diseases, in this stage, due to the glomerular filtration rate is severely reduced, resulting in the body water, metabolic waste can not be excreted, clinical will appear oliguria, anuria, edema, electrolyte disorders, acidosis, heart failure and a series of problems, need to start renal replacement therapy, such as hemodialysis. In the process of treatment, attention should be paid to the prevention of complications such as renal anemia and renal bone disease. Daily diet requires strict control of salt and water intake to avoid aggravation of body burden, as well as regular follow-up reviews to monitor changes in the condition.