Locally advanced colon cancer means that the colon tumor is relatively large and may break through the plasma membrane and invade the organs around the colon tumor, such as invading the peritoneum or ureter, kidney, duodenum, etc. There may also be peripheral lymph node metastasis, such as peri-intestinal lymph node metastasis or even lymph node metastasis in the root of the mesentery, but there is no distant metastasis, that is, the tumor does not have liver metastasis or does not have lung metastasis. If locally advanced colon cancer can be surgically resected, it should be surgically resected as much as possible. Without resection, the tumor may continue to progress and may lead to intestinal obstruction, and the patient may experience abdominal pain, abdominal distension, anal cessation and defecation. For locally advanced colon cancer, it will be significantly more difficult in the process of surgery, and the effect should be very good if it can achieve the purpose of radical treatment.