Blood ultrafiltration dialysis by HDF-ONLINE method actually bring many benefits for patients (patients) with chronic renal failure - dialysis cycles . Dialysis depatment of Hospital Viet Tiep conducted for 39 patients, with 20/29 (69 percent) of patients with pruritus, 20/25 (80 percent) of patients with anorexia support, 20/25 (80 percent) help insomnia patients, 7/11 (63.64 percent) patients with reduced weight loss, 18/21 (85.71 percent) of patients with bone and joint relief, and 39 patients (100 percent) stable circuit-HA in throughout the dialysis.