The concept of enhanced recovery after surgery (ERAS) was first proposed by professor Kehlet of Denmark in 1999. The core idea is to carry out a series of treatments on the perioperative period based on the concept of evidence-based medicine to reduce surgical trauma and stress. The disturbance of homeostasis makes the patient′s psychological and physiological conditions recover from surgery as soon as possible, reducing postoperative interference complications, shortening hospital stay, and re-admission rate. At present, ERAS is developed very rapidly, and all major centers have developed into their own unique ERAS path. While seeing the rapid development of ERAS, we should also pay attention to the fierce collision with traditional ideas and habits during the implementation of ERAS, and then raise questions about the ERAS solution. This paper will review the existing evidence of intestinal preparation at home and abroad and discuss the development of intestinal preparation from a historical perspective.