Normal tumor markers after rectal cancer surgery mostly indicate that the surgery has achieved certain curative effect, so patients need not worry too much and just follow the doctor’s instructions for regular rechecking. Tumor marker is a kind of material reflecting the existence and growth of tumor, which is mostly produced by gene expression of tumor cells. It is of great significance for tumor screening, auxiliary diagnosis, disease detection and prognosis judgment. If the tumor indicators of postoperative rectal cancer patients appear normal, it usually indicates that the surgery has achieved a certain curative effect, indicating a better recovery of the condition. Post-operation rectal cancer patients should also follow the doctor’s instruction to have regular checkups in order to understand the recovery of the disease. In the early stage of postoperative period, patients should choose easy-to-digest food with little residue, such as egg custard, minced meat, etc. With the gradual recovery of the body, they can transition to normal diet, and eat fiber-rich food to prevent constipation and keep the bowel movement unobstructed. Patients in the recovery period, such as the occurrence of physical abnormalities, should go to the regular hospital in a timely manner, relevant examinations, clear causes, as soon as possible to deal with, to avoid delays in aggravation of the condition.