What exactly is the cause of the onset? It is mainly caused by a high-fat and low-fiber diet. Our country’s rapid economic development in the past thirty years, the meat and oil stamps supplied by the population back then, has long since become history. Meat food smells good, roast meat, boiled meat, pork chops, steak, boiled fish, etc. In China since ancient history, the current stage of our country is probably the most abundant period of food and clothing. Our dietary structure has thus undergone a fundamental change. Europeans, Americans and imperialist powers love to eat meat, and so do we. Of course, this is only one aspect. Other factors related to the development of colorectal cancer include inflammation of the colon, colon adenoma, genetic factors, etc. The pathological types of colorectal cancer are relatively simple, adenocarcinoma accounts for the majority, mucinous carcinoma, undifferentiated carcinoma, and the rest of the pathological types are less. The treatment of colorectal cancer includes surgery, chemotherapy, immunotherapy, traditional Chinese medicine, etc. The treatment of early, middle and late stage colorectal cancer should be considered according to the specific condition. However, it is more difficult to detect early stage colon cancer, and cancer screening is a good means, and once there is a change in stool habit, a feeling of falling and blood in stool, you should go to hospital for further examination. The treatment of mid-stage colorectal cancer should consider surgery plus chemotherapy and other methods of treatment. There are many treatment methods and programs, and clinical research is progressing rapidly, and some of the treatment methods are exploratory. Without exploration, there is no progress in clinical medicine. Let’s talk about the surgery for rectal cancer with anal preservation, the reasons and conditions for adopting this surgical method, etc. Rectal cancer anus-preserving surgery is objectively influenced by multiple factors such as clinical staging, vascular length factor, length of the colon, and other factors, as well as the surgeon’s surgical skills, clinical experience, and clinical experience are all key factors in determining the success of the surgery. Of course, not all rectal cancers are in a position to preserve the anus, but if there is a ray of hope, we should do our best. Due to objective conditions such as social opinion, laws, and current policies, young clinicians who have been studying for years now hardly have the opportunity to experience such surgery as operators anymore, and there are even surgical methods they have never seen. Their progress needs to undergo a long period of time, which is a test for their endurance, patience, perseverance and growth.