Colorectal cancer is a malignant tumor of the gastrointestinal tract occurring at the junction of rectum and sigmoid colon, which is characterized by the following clinical features: First, the incidence of the disease is mainly in middle-aged and elderly people above 40 years old, accounting for about 60% of the total number of incidence, and men are significantly more than women; Second, before deterioration, benign tumors are mainly benign tumors, such as polyps. Benign tumors are mainly benign tumors, such as polyps, which usually have no obvious symptoms or symptoms are hidden, and are similar to hemorrhoids; third, tumor cells do not stay fixed in a certain place in the intestine, and are prone to metastasis, with common metastatic sites such as liver, and even spread to other organs throughout the body. The treatment is mainly surgical treatment, supplemented by Chinese medicine, but cancer cells may still metastasize after surgery, so it is recommended to observe the symptoms as early as possible for early detection and treatment.