Bowel cancer is most common in colorectal cancer, and there is a chronic evolutionary process in its occurrence and development. Because the occurrence of many tumors is related to the malignant disease of polyps and the malignant disease of ulcers, it takes about 1-2 years to transform from benign nodules and benign polyps to intestinal cancer. Therefore, during daily health checkups, if polyps of the intestine are found, they should be surgically removed at an early stage. For patients with obvious familial polyposis, they should undergo colonoscopy once every 6-12 months for early diagnosis and treatment. For malignant tumors of the intestine with local invasion, surgery should also be performed. Patients with advanced disease are prone to metastasis of distant organs, including abdominal cavity, liver, lung tissue, skull and brain, and vertebral bone tissue, etc. They can also choose intravenous chemotherapy and other methods according to their condition, which can also control the development of tumors.