To investigate the effects of dajianzhong decoction in regulating gastrointestinal function after abdominal surgery. Methods:A total of 165 cases who underwent abdominal surgery in our hospital from November 2012 to November 2014 were randomly divided into observation group of 86 cases and the control group of 79 cases. The control group was given Domperidone Tablets based on conventional treatment, and the observation group was given dajianzhong decoction on the basis of control group. Curative effects were evaluated after continuous treatment for 5 days. Gastrointestinal function recovery time after operation, plasma motilin level, T cell subsets and postoperative intestinal adhesion were compared between two groups. Results:The postoperative bowel sound recovery time, the time of gastrointestinal decompression and natural exhaust time of the observation group were significantly shorter than the control group, and the difference was statistically significant (P<0.05). The level of MOT in two groups had no significant difference before treatment (P>0.05), and plasma MOT levels of two groups increased significantly after treatment (P<0.05). After treatment, plasma MOT level of observation group was significantly higher than the control group (P<0.05). Before treatment, there was no significant difference between the two groups in T cell subsets (P>0.05), after treatment, the T cell subsets in the two groups were significantly improved (P<0.05), and the improvement of the observation group was significantly better than that of the control group (P<0.05). The incidence of postoperative intestinal adhesions in the observation group was significantly lower than that in the control group (P<0.05). Conclusion:Dajianzhong decoction has significant effects on promoting the function of the stomach in patients with abdominal surgery, can adjust the postoperative stress state, maintain the stability of internal environment, improve the immune function of patients, so as to improve the gastrointestinal function, and contribute to postoperative rehabilitation and improve the quality of life.