The diagnosis of colon cancer is based on pathological diagnosis as the gold standard. Once the diagnosis of colon cancer is confirmed, intensive CT and other related tests and examinations need to be improved to exclude metastasis and contraindications to surgery, and surgical treatment should be performed as early as possible. Colonic hepatic flexure is located in the left upper abdomen, and the surrounding organs are complicated, including liver, gallbladder and major blood vessels. Although the risk of surgery is high, in the long run, the benefits of surgical treatment outweigh the disadvantages.