Introduction to Laparoscopic Colorectal Surgery Laparoscopic colorectal surgery is different from traditional open surgery in that the operator’s hand does not enter the abdominal cavity, but instead makes 3 to 5 small holes of 5 to 12 mm in diameter in the abdominal wall. Using special instruments, isolation and removal of colon or rectal tumors is performed through these holes. Then 1 auxiliary incision of 4~5cm is made in the abdomen to complete the anastomosis of the bowel. Laparoscopic colorectal surgery has less interference with abdominal organs, less intraoperative bleeding, and less chance of postoperative intestinal adhesions. And it has less damage to the patient’s neurohumoral system and immune system. Therefore, the gastrointestinal function is restored quickly, and the patient recovers early and the hospitalization time is short. Easily accepted by the majority of patients. At present, the types of laparoscopic colorectal surgery mainly include the following: right hemicolectomy, left hemicolectomy and total colectomy; colostomy, sigmoid colon fixation; right hemicolectomy, transverse colorectal cancer, left hemicolectomy, and radical rectal cancer.