Colon cancer patients with abnormal stools after surgery should first be judged according to the patient’s postoperative recovery. If the stool is abnormal in the early stage after surgery, it may be caused by the change of the patient’s intestinal anatomy, and the patient is usually advised to eat liquid or semi-liquid food. If the patient has intestinal flora disorder, it may also cause abnormal stool, mainly manifested by abdominal distension, in addition, accompanied by diarrhea, a significant increase in the number of stools, watery stool, etc.. Patients can also take some oral intestinal probiotics and be treated with antibiotics if necessary. If the patient has been discharged from the hospital and the stool is still abnormal, oral intestinal astringent can be considered for treatment. Patients are advised to eat more fiber-rich foods and to go to the hospital for review, including colonoscopy, if necessary.