Abstract:Abstract: Objective To investigate the impact of laparoscopic radical resection of colorectal cancer on cellular immune function, gastrointestinal hormones and prognosis in patients with colorectal cancer. Methods 86 patients with colorectal cancer from July 2016 to October 2017 were divided into observation group and control group, 43 cases in each group. The control group was given open radical colorectal surgery, while the observation group was given laparoscopic colorectal cancer radical surgery, the surgery-related indicators, cellular immune function, gastrointestinal hormones and adverse reactions and other indicators of the two groups were compared. Results The operation time, defecation time, exhaust time and hospitalization time of the observation group were significantly longer than patients in the control group, and the amount of bleeding during operation was significantly less than that of the control group (t = 10.67, 11.22, 13.58, 8.56, 19.52, P < 0.05); the decrease of T lymphocyte CD3+, CD4+, CD8+, CD4+/CD8+ were significantly less than that of the control group (t = 10.99, 17.76, 10.46, 10.49, P < 0.05); the decrease of serum gastrin (GAS) and motilin (MTL) were significantly lower than those in the control group (t = 10.31, 13.73, P < 0.05); the complications such as intestinal obstruction were 11.63% lower than those in the control group (χ2 = 4.50, P < 0.05). Conclusion Laparoscopic radical resection of colorectal cancer is helpful to promote postoperative rehabilitation and reduce the incidence of postoperative complications, which may be related to the body’s cellular immune function, gastrointestinal hormones and other factors.