Colon cancer is a malignant tumor originated from epithelial cells of colon mucosa, and there is no such thing as “growing out of the stomach”, so it is recommended that patients with colon cancer undergo regular treatment in time. Colon cancer is one of the common malignant tumors in gastrointestinal tract, which can occur in transverse colon, descending colon, sigmoid colon, cecum and other parts. Early stage patients may have no obvious symptoms, but with the development of the disease, patients may have abdominal pain, anemia, abdominal mass, increased frequency of bowel movement and other symptoms, and late stage patients may also have liver enlargement, jaundice, ascites and other complications. Colon cancer is mainly treated by surgical resection, such as radical resection, proximal enterostomy. Radiotherapy and chemotherapy are also effective in the treatment of colon cancer. Early stage patients can get some relief after active and effective treatment, but if not treated in time, metastasis can occur, which can affect patients’ life. Early detection, diagnosis and treatment of colon cancer can improve the prognosis of the disease, patients should consult doctor in time and actively cooperate with doctor’s treatment.