【Abstract】Objective Discussion hypokalemia situation in elderly peritoneal dialysis (PD) patients, and the possible risks for hypokalemia in these patients. Methods Cross-sectional study. 184 cases of PD patients were involved and 100 cases were elderly patients. The general information of patients, serum potassium levels, level of potassium, dietary intake of potassium, loss of potassium from urine and PD fluid, and occurrence of complications had been investigated. Results The incidence of hypokalemia in old age group PD patients was 27.0%. The level of potassium and PD dose was negatively correlated (r=-0.257，p=0.021). The dose of PD patients was the only independence affects factors to hypokalemia (p=0.009). Conclusion Hypokalemia in the elderly PD patients was related to PD dose.