The stool of colon cancer generally appears as mucoid or purulent bloody stool, or there is alternation of diarrhea and constipation. The diagnosis of colon cancer mainly relies on electronic colonoscopy, and routine blood tests as well as carcinoembryonic antigen tests are also of certain reference value. Patients with colon cancer often present with symptoms like anemia and weight loss. Therefore, it is crucial for patients with colon cancer to obtain a definitive diagnosis as early as possible. In addition, early surgical treatment should be adopted. After surgery, adjunct treatments such as radiotherapy and chemotherapy should also be administered.