Abstract:Objective To investigate the Kang′ai injection on gastrointestinal function recovery and immune function after laparoscopic operation for rectal cancer. Methods A total of 96 rectal cancer patients who received treatment from February 2 to April 2018 were selected and divided into study group and control group randomly（n=48, each).The control group was treated with laparoscopic radical resection, and study group was treated with Kang′ai injection on the basis of the control group.The operation situation and gastrointestinal function recovery were recorded.The levels of CD3⁺, CD4⁺, CD4⁺/CD8⁺, CD23⁺ were measured before and after treatment in both groups. Results There were no significant differences in operation time, intraoperative bleeding loss, the number of lymph node examined and post-operative analgesia time between two groups (n>0.05).The anal exhaust time, intestinal sounds recovery time and fasting time in the study group were significantly lower than those in the control group.The levels of CD3⁺, CD4⁺, CD4⁺/CD8⁺, CD23⁺ was lower in control group after the treatment (P<0.05), but there was no significant difference in observation group.After the treatment, the level of CD3⁺, CD4⁺, CD4⁺/CD8⁺, CD23⁺ was significantly higher than that in control group (P<0.05). Conclusion Kang′ai injection could promote the recovery of gastrointestinal function and improve immune function in patients with rectal cancer after laparoscopic surgery.