Laparoscopic surgical treatment of colorectal cancer has been widely used in abdominal surgery. The intuitive impression of laparoscopic surgery is usually a few puncture points in the abdominal wall and a small 4-8 cm long incision for removing the surgical specimen. The taNOSE procedure is actually an abbreviation for trans-analnatureorificespecimenextraction (taNOSE), which means that the surgical specimen is removed from the abdominal cavity through the rectum and anus without the need for a secondary incision in the abdomen. This procedure is based on the traditional laparoscopic surgery, which further reduces the trauma to the patient and has superior minimally invasive and aesthetic features. In fact, taNOSE laparoscopic colorectal cancer surgery has been reported internationally five or six years ago, but because this procedure requires skillful laparoscopic operation and solid laparoscopic anastomosis technique, until now, there are not many medical institutions in China and abroad that can perform this technique. In order to enable patients to obtain more benefits from laparoscopic techniques, the physician has created a unique taNOSE laparoscopic surgery plan for colorectal cancer based on conventional laparoscopic equipment, studying domestic and international taNOSE surgical methods, and combining his own laparoscopic surgery experience, which not only achieves the same lymph node clearance as conventional surgery, but also reduces trauma to patients.