Results: There were no statistical differences in the levels of Ang-II, ACTH, Cor, NE, PEG2, SP, BK, NO, AOPP and LPO before operation between the two groups (P>0.05); at 24 h after operation, the level of each index was higher than that before operation in both groups. The levels of above-mentioned indexes in the observation group were (53.38 ± 4.65 pg/ml), (27.28 ± 3.06 pg/ml), (172.76 ± 10.65 ng/ml), (276.19 ± 24.12 ng/ml), (161.51 ± 16.70 pg/ml), (4.71 ± 0.51 μg/ml), (8.32 ± 0.64 μg/L), (13.42 ± 1.56 μmol/L), (202.38 ± 31.74 μmol/L), (4.29 ± 0.63 mmol/ml) respectively, were lower than those during the same period in the control group and the differences were statistically significant (P<0.05). Conclusion: PNUL has a less effect on stress hormones, vascular inflammatory factors, tissue damage inflammatory factors in patients with renal calculi and has a smaller trauma than PNPL. Thus, PNUL is recommended to be widely used in clinical practice.