ObjectiveTo study the clinical application of enteral microecopharmaceutics immunonutrition in the peroperation of colorectal cancer. MethodsLiteratures about enteral microecopharmaceutics immunonutrition published in China and abroad were collected and reviewed. ResultsEarly clinical application of enteral microecopharmaceutics immunonutrition in the perioperation can greatly improve the nutritional status of patients with colorectal cancer, increase the patients' immune function, reconstruct the intestinal flora, and reduce the incidence of complications. ConclusionsThe clinical application of enteral microecopharmaceutics immunonutrition in the perioperation of colorectal cancer can obviously improve patients' nutritional status and immune function, reduce the stress response, and improve its prognosis, but the use of best dose still need further study.