Colorectal cancer, also known as colorectal cancer, is a very common tumor in clinical practice, with the third highest incidence rate in China, and its incidence rate is still gradually increasing, which is an important disease leading to human death. Moreover, domestic colorectal cancer has a trend of rejuvenation, and the incidence of colorectal cancer under 50 years old in China is significantly higher than that in foreign countries; in addition, the proportion of middle and late stage colorectal cancer cases found in China is high, and these colorectal cancers are highly traumatic in surgery, require radiotherapy and chemotherapy after surgery, have a high recurrence rate after surgery, have poor functional preservation, and many require surgery for artificial anus, which affects patients’ survival quality after surgery, therefore, to improve the postoperative Therefore, to improve the survival rate and quality of life after colorectal cancer surgery, it is necessary to detect colorectal cancer at an early stage and to provide standardized treatment. Early detection of colorectal cancer is an important means to improve the efficacy of colorectal cancer. However, due to the lack of understanding of colorectal cancer, most of the colorectal cancers found in clinical practice are middle and late stage tumors, with poor treatment effect and high recurrence rate. In normal life, if some of the following conditions are found, timely medical consultation is needed to exclude whether you have colorectal cancer or find some precancerous lesions of colorectal cancer. Common early signals of colorectal cancer include: 1. unexplained blood in stool, blood in stool is the most common early signal of colorectal cancer, the common blood in stool is dark red blood, which can be mixed with some blood clots and pus blood, but some patients with fresh blood in stool should also pay attention to it, in clinical practice, we have met many patients with fresh blood in stool who underwent hemorrhoid surgery in outside hospital, and still had bleeding after surgery, and colon cancer was detected by colonoscopy; 2. unexplained abdominal pain and Diarrhea, in the clinic, there are more abdominal pain and diarrhea caused by colorectal cancer, but the symptoms are often atypical, so we cannot pay attention to them and ignore the possibility of colorectal tumor; 3.Constipation or difficulty in defecation, constipation is a very common symptom, and many people have experienced constipation, so they do not pay attention to it when it occurs, but some patients with colorectal cancer may be constipated, so when constipation occurs without timely treatment, they may be constipated. However, some patients with colorectal cancer may be constipated, so when constipation symptoms occur without timely treatment, the diagnosis of colorectal tumor may be delayed. We have encountered several cases of patients diagnosed as habitual constipation, which were found to be colon cancer causing incomplete intestinal obstruction during examination in our hospital, and even some patients needed emergency surgery because of colon obstruction, which increased the risk and difficulty of surgery; 4. unexplained anemia and fever, in the clinic, cancer of right hemicolectomy is often manifested as anemia and low fever, and the symptoms of intestinal tract are not very obvious, for some For some patients with unexplained anemia, it is necessary to perform colonoscopy to exclude the presence of right hemicolectomy tumor. After the diagnosis of colorectal cancer, many patients are very confused as to what treatment should be used. Some scholars believe that surgery should be performed first, followed by chemotherapy or intraoperative radiotherapy during surgery; some scholars believe that surgery should be performed first, followed by radiotherapy, because surgery can reduce the tumor load and improve the effect of radiotherapy and chemotherapy. Rectal cancer treatment is currently the most active area in colorectal cancer treatment, and important progress has been made in research targeting survival and quality of life after rectal cancer treatment. This is because the decision to perform anus-preserving surgery in rectal cancer treatment, especially for low rectal cancer, is an important advancement in current research. Although the anal preservation rate of rectal cancer can be improved by preoperative radiotherapy and chemotherapy, the radical surgery for anal preservation of rectal cancer in clinical practice should follow several principles: First, anal preservation surgery should not be performed at the expense of reducing the survival rate of patients, although some scholars claim that more than 90% of low rectal cancer can be preserved, its postoperative local recurrence rate may be higher, and anal preservation if it is performed at the expense of Secondly, preserving the anus should have complete function. Before we perform anal preservation surgery for low rectal cancer, we will first make a comprehensive judgment on the function of the anus and predict the function of the patient after low anal preservation. In clinical practice, we found that some patients, although preserving the anus, have very poor anal function, and patients defecate more than 10 or even 20 times a day, and some of them require artificial anal surgery again because they cannot tolerate anal incontinence; thirdly, combined Chinese and Western medicine treatment for rectal cancer is very important to restore the function of rectal cancer after surgery, and after anal preservation surgery for low rectal cancer, patients are often left with anal pain, anal incontinence, urinary dysfunction and male sexual dysfunction, all of these complications have no effective treatment in modern medicine, the use of Chinese medicine acupuncture and Chinese medicine dialectical treatment can significantly improve the efficacy of patients and patients’ quality of life; fourth, good training for surgeons should be of great significance in improving to the treatment of rectal cancer, in the Nordic study of rectal cancer treatment found that In the Nordic study of rectal cancer treatment, it was found that if the doctors of rectal cancer treatment are well trained and the rectal cancer treatment center is well managed, the effect of rectal cancer treatment can be significantly improved. The 5-year survival rate of rectal cancer in the Nordic countries is over 65%, which is the best in the world in terms of rectal cancer treatment efficacy. Although some progress has been made in the training of physicians in China, there is still no significant progress in the standard treatment of individual diseases, so further training is needed. The causes of colorectal cancer are still unclear, but can be related to diet, genetics and environmental factors. In Chinese traditional medicine, it is believed that colorectal cancer is caused by “dietary injury, prolonged diarrhea and dysentery, or depression, resulting in stagnation of Qi and blood stasis, dampness and heat accumulation and deficiency injection”. Therefore, it is very important to prevent the occurrence of colorectal cancer through diet. In the current study, it is believed that low-fat, low-calorie and fiber-rich foods are beneficial to the prevention of colorectal cancer, so it is recommended to eat more coarse fiber foods such as corn, sweet potato, cucumber and other foods to prevent the occurrence of colorectal cancer. A large number of studies have shown that tea polyphenols, the active ingredient in tea, can inhibit the occurrence of many tumors including colorectal cancer, so it is recommended that people drink tea may help prevent the occurrence of tumors. In addition to dietary regulation to reduce colorectal cancer, establishing a regular follow-up system is an important means to prevent the occurrence of early colorectal cancer. Some western countries have established a complete follow-up system for colorectal cancer in China to screen high-risk groups for colorectal cancer in order to detect some early colorectal cancer and precancerous lesions of colorectal cancer, but since a comprehensive colorectal cancer screening program has not yet been established in China, we It is recommended that the following groups should be followed up regularly: 1. people over 40 years old should have a colonoscopy once every 3-5 years; 2. people with a family history of colorectal cancer should have a colonoscopy every 2-3 years after the age of 35; 3. family members with familial adenomatous polyposis should have a colonoscopy once a year after the age of 12 and may need a total colectomy after the age of 18; 4. family members with hereditary non-polyposis colorectal cancer should have a colonoscopy once a year after the age of 18; and 5. Family members with hereditary non-polyposis colorectal cancer should undergo their first colonoscopy after the age of 18 with their consent, and then once every 2-3 years. For lesions such as colon polyps found during the screening process, endoscopic treatment can reduce the occurrence of colorectal cancer, and in addition, if early colorectal cancer is found, regular treatment can improve the survival rate of patients and achieve the purpose of cure.