As one of the crucial measures in the action plan for improving health services, day surgery is committed to efficiently integrating medical resources and improving the quality of medical services. Nowadays, public hospitals in China are vigorously promoting the day surgery cases. The normalization of day surgery is also one of the major goals for the Department of Gastroenterology to meet the current medical needs and explore sub-professional development in line with the discipline’s advantages. Taking the current status of day surgery in the Department of Gastroenterology of West China Hospital of Sichuan University as an example, this paper explores and constructs the “Huaxi Model of Day Surgery in the Department of Gastroenterology”, focusing on the management mode, operation process, operation implementation, quality and safety assurance of day surgery, so as to facilitate the exchange of experiences.