Before dialysis symptoms of edema accounted for the largest proportion of 70, 39%, followed by headache (44, 74%), dizziness (40, 79%), nausea, vomiting (36, 18%); shortness of breath accounted for 26, 32%; After filtering, the symptoms were clearly reduced except for symptoms such as dizziness, headache, nausea and vomiting, the efficiency index decreased with the rate of 43.55%; 27.27% and 26.47%.