The principle of complete mesenteric excision (CME) has been applied in colon cancer surgery for ten years. The concept of CME emphasized embryological anatomical complete resection of mesocolon, dissection of the central lymph nodes and high ligation of feeding vessels However, in the subsequent clinical application and promotion, it was found that the principle has not been accurately defined in many aspects, such as the boundary of the central lymph node dissection and the length of the bowel resection in the right colectomy for colon cancer. The quality control standards for CME procedure has also been clarified in the process of continuous practice. This article reviews the definition of extended laparoscopic resection of right colon cancer and the principles of CME operation, and discusses the evaluation criteria of extended laparoscopic resection of right colon cancer.