There is no fixed value for the amount of water dispensed at one time for peritoneal dialysis, and the amount of water dispensed for peritoneal dialysis is mainly closely related to the patient’s condition and physical condition. Peritoneal dialysis is a kind of renal replacement therapy, mainly by adding osmotic substances such as glucose, calcium, potassium, etc. to the peritoneal dialysis fluid, so that the osmotic pressure difference between the peritoneal dialysis fluid and blood is formed, so that the metabolic wastes in the blood and the excess water can enter into the peritoneal dialysis fluid through the peritoneal membrane through the pressure difference, and then achieve the therapeutic purpose. Peritoneal dialysis water output is the so-called ultrafiltration volume. In clinic, peritoneal dialysis program should be individualized, too much ultrafiltration volume will increase the loss of protein and other nutrients, affecting the systemic condition of dialysis patients, too little ultrafiltration volume is difficult to expel the metabolic waste produced by the body every day. Therefore, it is recommended that dialysis patients should go to regular hospitals for consultation, formulate individualized abdominal dialysis plan according to their own conditions, and seek medical advice to adjust the dialysis plan in time if there is any abnormality in the amount of abdominal dialysis.