Abstract: Obstructing colorectal cancer is one of the acute abdominal diseases which are common in clinical practice. The initial symptoms of 8.0%-33.9% patients with obstructing colorectal cancer are complete or incomplete acute colonic obstruction. Seventy percent of obstructing colorectal cancer located at the left colon. There are no standard treatment methods for obstructed left colonic carcinoma (OLCC). Previously, a staged procedure was recommended. With the improvement of the intestinal surgical techniques, onestage resection and anastomosis including intraoperative colonic irrigation, subtotal colectomy, metal stents placement and transanal drainage tube placement were preferred by most of the surgeons. In addition, metal stents placement and transanal drainage tube placement can reduce bowel pressure, which creates the possibility for the treatment of malignant colorectal obstruction by laparoscopes.