Although natural orifice transluminal endoscopic surgery provides excellent cosmesis,it is not being widely accepted because of the restriction in aspects of technology,instruments and ethics.As a bridge,laparoendoscopic single site surgery(LESS)has been widely applied in digestive surgery,including bariatric,gastric,hepatobiliary and colorectal surgery.Although LESS provides excellent cosmetic results,and its safety and feasibility seems similar to conventional laparoscopy in most procedures,its effectiveness in the treatment of malignant tumors still needs to be proved. Compared with conventional laparoscopy,LESS has the drawbacks of longer operation time and higher demand in experience.Besides,because digestive tract reconstruction is often needed after resection,more convenient and applicable instruments need to be invented for the development of LESS.