To investigate the effect of Buzhong Yiqi Decoction（补中益气汤）on immune function and prognosis of elderly patients undergoing laparoscopic inguinal hernia repair.

Ninety-six elderly patients with inguinal hernia admitted to the hospital were selected and randomly divided into two groups，48 cases in each group. Both groups received laparoscopic inguinal hernia repair. The control group received anti-infection treatment on the basis of this and the observation group was combined with Buzhong Yiqi Decoction on the basis of the control group for 7 days. The clinical therapeutic effect，immune function，visual analogue score（VAS）score，exhaust time，time of getting out of bed，length of hospital stay and postoperative complications of the two groups were compared.

The total effective rate of the control group（87.50%）was significantly lower than that of the observation group（97.92%），with statistical significance（P<0.05）. After 3 days of treatment，VASscores in both groups were significantly lower than those before treatment（P<0.05）. There was no statistical difference between the groups. After 7 days of treatment，VASscores of both groups were significantly lower than those before treatment and 3 days after treatment，and the score of the observation group was significantly lower than that of the control group（P<0.05）. The levels of immunoglobulin G（IgG），immunoglobulin A（IgA）and immunoglobulin M（IgM）in both groups were significantly increased after treatment compared with those before treatment（P<0.05），and the improvement in the observation group was significantly better than that in the control group（P<0.05）. Anal exhaust，postoperative getting out of bed and postoperative hospitalization time in the observation group were better than those in the control group（P<0.05）. The complication rate was 14.59% in the control group and 2.08% in the observation group. The complication rate in the observation group was significantly lower than that in the control group（P<0.05）.

Buzhong Yiqi Decoction has a good therapeutic effect on the elderly patients undergoing laparoscopic inguinal hernia repair. It can improve the immune function，promote the rehabilitation，reduce the complications，and has high safety. It is worthy of clinical application.