The difference between hemodialysis 2 times a week or 3 times a week is different in total dialysis duration and dialysis adequacy. The general requirement of hemodialysis 3 times a week, each time time 4 to 5 hours, 12 to 15 hours of hemodialysis per week; the total dialysis duration is different between 2 times a week and 3 times a week hemodialysis. Maintenance hemodialysis patients, how many times per week need dialysis, each person’s situation is different, so the number of times and requirements are also different. The first step is to ensure the adequacy of hemodialysis. The adequacy of dialysis can be assessed by appetite, blood pressure, cardiac function, anemia, nutritional status, etc., and laboratory tests such as blood creatinine, electrolytes, and acid-base balance. It is recommended that maintenance hemodialysis patients should be evaluated under the guidance of nephrology specialists to clarify the number of hemodialysis sessions and reduce complications.