The study was to evaluate nutritional status of patients with chronic renal failure with dialysis in Bach Mai hospital. The results showed that nutritional status of patients with chronic renal failure with dialysis according to BMI: Percentage of energy deficiency (BMI 18.5) was 37.3 percent, higher proportion of female patients than male patients (p 0.05). According to SGA index: The risk of malnutrition severity (level C) was 18 percent, the risk of mild malnutrition (level B) is 44 percent. There are 13.4 percent of patients with low serum albumin concentrations ( 35 g/l), 6 percent of patients with a combination of lack of serum albumin and low BMI (BMI 18.5 and Albumin 35 g/l). In conclusion, In patients with chronic renal failure on dialysis cycle is just lack of energy in place, just missing both protein and energy.