Colorectal cancer should be diagnosed and treated early for better results; once it reaches advanced stage, it is not only difficult to treat, but also the survival rate is low. Of course, there are many means to treat colorectal cancer nowadays, and the 5-year survival rate of patients has been greatly improved compared with before, but this is based on the relevant conditions of patients. For colorectal cancer, multidisciplinary comprehensive treatment is advocated, that is, medical, surgical and radiological departments work together to treat the disease comprehensively, which is the development trend of cancer treatment and also to ensure the maximum success of the first treatment for patients. Of course, the treatment methods for different stages of the disease are different, and doctors have to do different treatments according to the different conditions of patients. For early and middle stage patients, comprehensive treatment is mainly surgery (some patients need radiotherapy before surgery); for advanced stage patients, comprehensive treatment is mainly drug therapy, but for some colorectal cancer, even if metastasis may occur, the primary site needs to be removed. However, so far, surgery is still the only radical treatment for colorectal cancer, so patients who need surgery and have the conditions should not miss the best time for surgery to avoid regret.