The effect of minimally invasive laparoscopic surgery for gastric and rectal cancer is really good, even I couldn’t believe it before I carried out this surgery. Recently, I realized the superiority of laparoscopic treatment for gastric and colon cancer so much only after doing several cases of D2 radical treatment for gastric cancer and radical treatment for rectal cancer. First of all, there is no need to operate, only 5 small holes are made in the abdomen; secondly, the abdominal lesions are clearly visible under the magnification of high-definition laparoscopy, which is much clearer than open surgery; thirdly, under the action of ultrasonic knife, the abdominal vascular sheath is opened, the blood vessels are skeletonized, and the lymph nodes are cleanly cleared, which is even more impossible to do with open surgery; fourthly, there is less interference and damage in the abdominal cavity, and there is no need to interfere with the damage caused by pulling hooks and large gauze pads during open surgery, which is even less. The first is that the abdominal cavity is not affected by the internal environment and immune system of the human body. Minimally invasive laparoscopic surgery for gastric cancer and rectal cancer can be eaten 2-3 days after surgery, without postoperative enema and anal dilatation; it can be discharged in 7 days; there is no incision in the abdomen, so there is no need to worry about the incision splitting and poor healing like open surgery.