Ultrafiltration of peritoneal dialysis can be increased by the following ways: first, change the concentration of the peritoneal dialysis solution, in the clinic the commonly used concentration of the peritoneal dialysis solution is 1.5% peritoneal dialysis solution, it can be changed to 2.5% peritoneal dialysis solution to increase the amount of ultrafiltration because the higher the concentration of the peritoneal dialysis solution, the better the effect of ultrafiltration, but do not recommend that the patients use 2.5% peritoneal dialysis solution for a long time because 2.5% peritoneal dialysis solution may accelerate peritoneal failure. However, it is not recommended that patients use 2.5% PD solution for a long time, because 2.5% PD solution may accelerate peritoneal failure. It should be reminded that if peritoneal dialysis is accompanied by edema, it is recommended to drink as little water as possible to avoid aggravating the edema.