A laparoscope is an endoscope used for intra-abdominal examination and treatment. In essence, it is a fiberoptic light source endoscope that includes a laparoscope, an energy system, a light source system, a perfusion system and an imaging system. It is applied to surgical patients under anesthesia to provide a direct and clear view of the patient’s intra-abdominal cavity and to understand the causative factors, while doing surgical treatment for abnormalities. With the laparoscopic system, the surgeon only needs to make a few small holes around the patient’s surgical site and can visualize the patient’s body in front of a computer screen and perform precise surgical operations without opening the abdomen. Laparoscopic surgery technology has been widely popularized in large and medium-sized hospitals across the country, and laparoscopic treatment of colorectal cancer is one of the most widely used surgeries, which has the following advantages: 1, multi-angle “inspection”, the effect is intuitive, the doctor’s magnifying glass Laparoscopy can be examined from different angles and directions without involving the abdominal organs, and even You can see some very deep, narrow space, to achieve the effect of intuitive inspection, no leakage, no misdiagnosis. The rectum is located in the pelvic cavity, which requires a huge incision in the abdomen for traditional open surgery, and even then, it still does not ensure that the surgeon can have a good view. Laparoscopy, on the other hand, is a better solution to this problem. The lens can penetrate deep into the abdominal cavity, thus allowing the surgeon to better observe the tumor. 2. Patients recover quickly after surgery and hospitalization time is short. Laparoscopic surgery is performed in the closed pelvic and abdominal cavity, the internal environment is disturbed very little, the operation is mainly based on electric cutting and coagulation, the blood vessels are first coagulated and then broken, hemostasis is complete, bleeding is minimal, and the abdominal cavity is rinsed thoroughly before the end of surgery to keep it clean. The trauma suffered by the patient is far less than that of open surgery, which enables the patient to recover faster after surgery. Due to the painful incision of open surgery patients, patients often walk on the ground very late, while laparoscopic surgery, because of the small incision, can walk on the ground in a short time after surgery, and recover quickly after surgery to shorten the hospital stay. 3, good abdominal cosmetic effect Traditional surgical scars are long and linear, about 10-375px in length, and may be extended according to the intraoperative situation, affecting the appearance. In contrast, the incision in the abdomen of laparoscopic surgery is significantly shorter, and the poke holes in the abdominal wall are small (ranging from 3-10mm), scattered and concealed, and do not affect the aesthetics after healing. In addition, the poke hole infection is far less than the traditional open incision infection or fat liquefaction. 4, less pelvic adhesions Laparoscopic surgery is less disturbing to the pelvic cavity, there is no gauze and hand contact to the tissue, and few or no sutures are needed. The pelvic cavity is fully flushed during the operation, so the pelvic adhesions in patients after laparoscopic surgery are far less than those in open surgery. As a result, postoperative bowel function recovers quickly, allowing earlier feeding, and again greatly reducing the factor of postoperative bowel adhesions. With a clear diagnosis and confirmation of no contraindications to surgery, patients with colorectal cancer can choose laparoscopic surgery for treatment.